Carbon storage amount measurement system and carbon storage amount measurement method

Abstract

To estimate a carbon storage amount derived from blue carbon in the sea with high accuracy.SOLUTION: A carbon storage amount measurement system includes a first estimation unit configured to estimate a bottom-mud-derived substance concentration based on a measurement value representing a characteristic of seawater in a sea area to be surveyed, a second estimation unit configured to estimate a seawater carbon storage amount based on the measurement value, a first calculation unit configured to calculate a land-area-derived carbon storage amount in the sea area based on external factor data for the sea area, a second calculation unit configured to calculate a bottom-mud-derived carbon storage amount in the sea area based on the bottom-mud-derived substance concentration, and a third calculation unit configured to calculate a blue carbon-derived carbon storage amount by subtracting the land-area-derived carbon storage amount and the bottom-mud-derived carbon storage amount from the seawater carbon storage amount.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a carbon stock measurement system and a carbon stock measurement method. [Background technology]

[0002] In recent years, in seaweed beds where natural seaweed and seaweed grow abundantly, and in seaweed farms where seaweed and seaweed are artificially cultivated, carbon has been stored over the long term as organic matter through photosynthesis from dissolved carbon dioxide in seawater, and this has attracted attention as a phenomenon known as blue carbon.

[0003] It is thought that blue carbon accumulation occurs through the accumulation of dead seaweed on the seabed, the sinking of detached seaweed into the deep sea, the secretion of persistent dissolved organic matter from seaweed, algae, and phytoplankton, and the biodegradation of easily degradable dissolved organic matter secreted by seaweed, algae, and phytoplankton, which then sinks to the deep sea.

[0004] As part of efforts to decarbonize and mitigate climate change, carbon credits have begun to be issued for carbon storage through blue carbon.

[0005] When certifying and issuing carbon credits for blue carbon, it is necessary to evaluate the amount of CO2 (carbon dioxide) stored in the target marine area. As a convenient method for estimating the amount of CO2 stored in marine areas, the Wetland Guidelines created by the Intergovernmental Panel on Climate Change (IPCC) provide a procedure for calculating the amount of CO2 stored from the area and absorption coefficient of each type of seaweed bed.

[0006] The area of ​​seaweed beds has been measured using various methods, such as underwater camera photography and satellite images. The absorption coefficient is determined based on the type of plant in the seaweed bed and past survey results.

[0007] Furthermore, because the amount of persistent dissolved organic matter is a direct indicator of carbon storage, estimating carbon storage through annual monitoring of the amount of persistent dissolved organic matter in marine areas may be able to provide a more realistic assessment of carbon storage compared to calculations using seaweed bed area and absorption coefficients, as this reflects the influence of each year's weather conditions, etc.

[0008] Regarding the measurement of dissolved organic matter in marine areas, for example, Patent Document 1 describes a towed marine dissolved substance observation robot comprising: an observation robot main body towed by an observation mother ship via a tow cable; a robot control device installed on the observation mother ship; measuring instruments mounted on the observation robot main body including at least an ultrasonic current meter and a marine dissolved substance analyzer necessary for observing seawater; horizontal main wings installed on the observation robot main body with adjustable elevation and depression angles; drive means that controls the horizontal main wings in response to commands from the robot control device and controls the diving depth of the observation robot main body; a pair of horizontal tails also installed on the observation robot main body, extending to the left and right and each with adjustable elevation and depression angles; and control means that controls the horizontal tails in response to detection by an inclination attitude detection device installed on the observation robot main body, thereby controlling the lateral and vertical inclination of the observation robot main body.

[0009] The towed marine dissolved substance observation robot described in Patent Document 1 can measure the amount of dissolved organic matter in the ocean continuously over time and space. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 6-344979 Summary of the Invention [Problem to be solved by the invention]

[0011] Continuous monitoring of dissolved organic matter in actual marine areas requires addressing various issues. For example, coastal areas are prone to sudden events, such as a sudden increase in river water inflow due to heavy rain on land or bottom mud being stirred up by wind. These events cause dissolved organic matter other than seaweed and algae to be excluded from the assessment of blue carbon carbon storage.

[0012] The technology described in Patent Document 1 uses a dissolved substance analyzer, which is thought to be able to accurately assess the amount of dissolved organic matter in the ocean. However, because the dissolved substance analyzer evaluates carbon storage including increases and decreases in the amount of dissolved organic matter due to factors other than blue carbon, there is a possibility that the estimated carbon storage amount may be overestimated or underestimated compared to the actual amount of carbon storage derived from blue carbon.

[0013] The present invention has been made in consideration of the above points, and aims to enable highly accurate estimation of the amount of carbon stocks derived from blue carbon in the ocean. [Means for solving the problem]

[0014] The present application includes a number of means for solving at least part of the above problems, examples of which are as follows.

[0015] In order to solve the above-mentioned problems, a carbon stock measurement system according to one embodiment of the present invention comprises a first estimation unit that estimates the concentration of bottom-mud-derived substances based on measurement values ​​that represent the characteristics of seawater in a sea area being investigated, a second estimation unit that estimates the amount of carbon stock in seawater based on the measurement values, a first calculation unit that calculates the amount of terrestrial-derived carbon stock in the sea area based on data on external factors for the sea area, a second calculation unit that calculates the amount of bottom-mud-derived carbon stock in the sea area based on the concentration of bottom-mud-derived substances, and a third calculation unit that calculates the amount of blue carbon-derived carbon stock by subtracting the amount of terrestrial-derived carbon stock and the amount of bottom-mud-derived carbon stock from the amount of carbon stock in seawater. [Effects of the Invention]

[0016] According to the present invention, it is possible to estimate the amount of carbon stocks derived from blue carbon in the ocean with high accuracy.

[0017] Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a carbon stock measurement system according to one embodiment of the present invention. [Figure 2] FIG. 2 is a flowchart illustrating an example of a carbon stock measurement method using the carbon stock measurement system. [Figure 3] FIG. 3 is a diagram showing a display example of a UI (User Interface) screen. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of the present invention will be described below with reference to the drawings. The embodiments are merely illustrative and are omitted or simplified as appropriate for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural. The position, size, shape, and scope of each component shown in the drawings may not represent the actual position, size, shape, and scope in order to facilitate understanding of the invention. In all drawings used to explain the embodiments, identical components are generally designated by the same reference numerals, and repeated description of such components will be omitted. Furthermore, in the following embodiments, a component (including an element step, etc.) is not necessarily essential unless otherwise specified or considered to be clearly essential in principle. Furthermore, when the term "consisting of A," "composed of A," "having A," or "including A" is used, it does not exclude other elements unless otherwise specified, specifically referring to only that element. Similarly, in the following embodiments, when referring to the shape, positional relationship, etc. of a component, etc., it includes substantially similar or similar shapes, etc., unless otherwise specified or considered to be clearly essential in principle. Furthermore, "obtaining" includes, as specific examples, at least the subject generating, calculating, or receiving from outside.

[0020] <Carbon Stock Measurement System 1 According to an Embodiment of the Present Invention> 1 shows an example of the configuration of a carbon stock measurement system 1 according to one embodiment of the present invention. In the carbon stock measurement system 1, dissolved organic matter in seawater, which is a source of carbon sequestration in seawater, is classified into three types according to its origin.

[0021] The first type is organic matter produced by photosynthesis of seaweed, algae, phytoplankton, etc., and dissolved organic matter that is decomposed by bacteria, etc. Hereinafter, this will be referred to as BC (blue carbon)-derived organic matter.

[0022] The second type is dissolved organic matter that is produced on land and flows into the ocean via rivers that connect to the sea. Hereafter, this will be referred to as land-derived organic matter.

[0023] The third type is dissolved organic matter that was present in the mud on the seafloor and has come to exist in the ocean through leaching, stirring up of the mud, etc. Hereinafter, this will be referred to as bottom-mud-derived organic matter.

[0024] Because BC-derived organic matter, terrestrial-derived organic matter, and bottom-mud-derived organic matter are all mixtures of many different types of dissolved organic matter, it is difficult to separate them using conventional organic matter measurements. Therefore, in this embodiment, the carbon storage amounts of terrestrial-derived organic matter and bottom-mud-derived organic matter are calculated by measuring individual indicators that correlate with the carbon storage amounts of terrestrial-derived organic matter and bottom-mud-derived organic matter, respectively. This allows the carbon storage amount of BC-derived organic matter in marine areas to be estimated separately from the carbon storage amounts of terrestrial-derived organic matter and bottom-mud-derived organic matter. Hereinafter, the carbon storage amounts of BC-derived organic matter, terrestrial-derived organic matter, and bottom-mud-derived organic matter will be referred to as the BC-derived carbon storage amount, terrestrial-derived carbon storage amount, and bottom-mud-derived carbon storage amount, respectively.

[0025] The carbon stock measurement system 1 includes a plurality of measurement devices 10 and a carbon stock calculation device 20.

[0026] The measurement device 10 is placed at multiple measurement points set in the sea area to be surveyed. Specifically, for example, the measurement device 10 may be fixed to a buoy, a sign, a wind power generation device, or the like installed on the sea, or the measurement device 10 may be mounted on a mobile object such as a remotely operated vehicle (ROV).

[0027] The measuring device 10 periodically estimates the concentration D1 of substances derived from bottom mud and the amount of carbon stock in seawater D2 at each measurement point, and transmits this information together with the location information (latitude, longitude) of each measurement point to the carbon stock calculation device 20 via the network N. The measuring device 10 corresponds to the first estimation unit and the second estimation unit of the present invention.

[0028] The position information of each measurement point is acquired by a positioning sensor such as a GPS (Global Positioning System) mounted on the measurement device 10. The network N is, for example, a communication network such as a satellite communication network, a mobile phone communication network, or the Internet.

[0029] The concentration D1 of substances derived from bottom mud and the amount of carbon stored in seawater D2 are estimated by the measuring device 10 by measuring values ​​of predetermined items that represent the characteristics of seawater at multiple different depths (at least two locations: the surface and bottom layers of the ocean) at the same measurement point (latitude and longitude) and then averaging the measurement results. This makes it possible to reduce the effects of river water and rainwater inflow, tides, stirring up bottom mud, and stirring up seawater by ships, particularly in coastal areas.

[0030] The measuring device 10 has one or more measuring devices for measuring the concentration D1 of bottom-mud-derived substances and values ​​of predetermined items that can be converted into the amount of dissolved organic matter in seawater, and converts the measured values ​​of the measuring devices into the concentration D1 of bottom-mud-derived substances using a predetermined calculation formula. The measuring device 10 also converts the measured values ​​of the measuring devices into the amount of dissolved organic matter in seawater using a predetermined calculation formula, and further converts the amount of dissolved organic matter in seawater into the amount of carbon storage in seawater D2.

[0031] It is desirable that the formula and coefficients for converting the measurement values ​​of the measuring device into the concentration D1 of bottom-mud-derived substances, the formula and coefficients for converting the measurement values ​​of the measuring device into the amount of dissolved organic matter in seawater, and the formula and coefficients for converting the amount of dissolved organic matter in seawater into the amount of carbon stocks in seawater D2 be set based on the results of evaluation and analysis using a precision measuring device or the like of seawater sampled at the same location as the buoy where the measuring device 10 is placed, and that these be corrected by continuously conducting the same evaluation and analysis. It is also desirable that evaluation and analysis using a precision measuring device or the like be conducted periodically, for example, during periods of high and low water temperatures.

[0032] An example of a predetermined item that can be converted into the concentration D1 of bottom-mud-derived substances is hydrogen sulfide. Bottom mud is formed when organic matter in seawater settles and accumulates on the seabed. Organic matter and nutrients return to the seawater through elution and stirring up from the bottom mud, resulting in the presence of dissolved organic matter derived from the bottom mud in the seawater. Because molecular oxygen is lacking in the lower layer of bottom mud, hydrogen sulfide is generated by the action of anaerobic bacteria such as sulfate-reducing bacteria. Because hydrogen sulfide is a substance generated in oxygen-deficient regions such as bottom mud, it is suitable for measuring bottom-mud-derived substances.

[0033] Examples of predetermined items that can be converted into the amount of dissolved organic matter in seawater include the absorbance, fluorescence intensity, turbidity, and conductivity of seawater. The measuring device 10 may also be provided with a pre-processing unit 11 that performs pre-processing to improve the measurement sensitivity of the predetermined items. Pre-processing by the pre-processing unit 11 includes, for example, concentration processing (membrane distillation, dialysis, etc.), labeling agent addition processing (for fluorescence detection, for absorption detection), etc.

[0034] As a modified example, the measuring device 10 may transmit measurement values ​​of predetermined items to the carbon stock calculation device 20, which may then convert the measurement values ​​of the predetermined items to a concentration D1 of substances derived from bottom mud or to the amount of dissolved organic matter in seawater, and further convert the amount of dissolved organic matter in seawater to a carbon stock in seawater D2. In other words, the carbon stock calculation device 20 may have the first estimation unit and the second estimation unit of the present invention.

[0035] The carbon stock calculation device 20 has an input unit 21, a processing unit 22, a storage unit 23, a communication unit 24, and a display unit 25. The carbon stock calculation device 20 is realized by a general computer such as a personal computer or a server computer. The computer includes a processor such as a CPU (Central Processing Unit), a memory such as a DRAM (Dynamic Random Access Memory), a storage such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive), input devices such as a keyboard, a mouse, and a media drive, an output device such as a display, and a communication module such as an Ethernet (trademark) card or a Wi-Fi (trademark) adapter.

[0036] The input unit 21 is realized by an input device of a computer that constitutes the carbon stock calculation device 20. The input unit 21 accepts input of external factor data D3 necessary for calculating the terrestrial carbon stock, and outputs it to a first calculation unit 221 of the processing unit 22.

[0037] Possible sources of organic matter originating from land include forests, farmland (fields), and sewage (wastewater) treatment facilities near inflowing rivers connected to the sea. Therefore, examples of external factor data D3 include the organic matter concentration near the river mouth, the flow rate of the inflowing river, precipitation in the river basin, the water quality (e.g., BOD (biochemical oxygen demand), COD (chemical oxygen demand)) and discharge rate of treated water discharged from sewage (wastewater) treatment facilities connected to the inflowing river, and topographical and land use data (e.g., forests, farmland, etc.) of the basin. Furthermore, wind direction, wind speed, seawater temperature, and ocean currents in the sea area may be added to the external factor data D3. Adding these data allows the diffusion state of inflowing river water in the sea area to be estimated, thereby improving the temporal and spatial calculation accuracy of the terrestrial carbon stocks by the first calculation unit 221.

[0038] The processing unit 22 is realized by a processor of a computer that constitutes the carbon stock calculation device 20. Each functional block of the processing unit 22, namely, a first calculation unit 221, a second calculation unit 222, a third calculation unit 223, and a display control unit 224, is realized by the processor executing a predetermined program stored in a memory.

[0039] The predetermined program executed by the processor may be stored in memory in advance, or may be downloaded from a predetermined server or the like via a removable medium (CD-ROM, flash memory, etc.) or a network such as the Internet, stored in storage, which is a non-transitory storage medium, and read from the storage when needed. For this reason, it is preferable that the computer has an interface for reading data from removable media.

[0040] The carbon stock calculation device 20 may be realized by one physical or logical computer, or by two or more physical or logical computers, which may be distributed over a network.

[0041] The first calculation unit 221 calculates the amount of terrestrial carbon stock D4 that has flowed into the marine area based on the external factor data D3 and outputs the calculated amount to the third calculation unit 223. Specifically, for example, the first calculation unit 221 determines a standard carbon stock C0, which serves as a reference, using a table or the like prepared in advance based on the organic matter concentration near the river mouth. Next, the first calculation unit 221 estimates a change (increment) C1 in the amount of carbon from carbon sources such as forests and farmland, whose water volume fluctuates with rainfall and whose carbon release amount fluctuates accordingly, by calculating the product of the emission coefficient from the carbon source (the organic matter concentration when the water flows into the river) and the amount of rainfall (increase in water volume). Next, the first calculation unit 221 estimates a change (increment) C2 in the amount of carbon from carbon sources such as sewage treatment plants, whose carbon release amount fluctuates depending on the treatment conditions, by calculating the change in the product of the water quality (TOC, etc.) of the effluent and the effluent volume. Next, the first calculation unit 221 calculates the terrestrial carbon stock D4 by adding C0, C1, and C2 as shown in the following formula (1). D4=C0+C1+C2 (1)

[0042] The second calculation unit 222 calculates the bottom-mud-derived carbon storage amount D5 based on the bottom-mud-derived substance concentration D1 input via the communication unit 24, and outputs it to the third calculation unit 223. Specifically, for example, the bottom-mud-derived carbon storage amount D5 is calculated using a calculation formula, table, or the like prepared in advance.

[0043] The third calculation unit 223 calculates the BC-derived carbon storage amount D6 by subtracting the terrestrial-derived carbon storage amount D4 input from the first calculation unit 221 and the bottom mud-derived carbon storage amount D5 input from the second calculation unit 222 from the seawater carbon storage amount D2 input via the communication unit 24, as shown in the following equation (2), and outputs the calculation result to the memory unit 23. D6 = D2 - D4 - D5 (2)

[0044] The display control unit 224 causes the display unit 25 to display a UI screen 1000 (FIG. 3). For example, the UI screen 1000 displays a graph showing a time series change in the BC-derived carbon storage amount D6 based on the BC-derived carbon storage amount D6 stored in the storage unit 23.

[0045] The storage unit 23 is realized by computer storage. The storage unit 23 stores time-series data of the BC-derived carbon storage amount D6 calculated by the third calculation unit 223. Note that the storage unit 23 may store time-series data of the bottom-mud-derived substance concentration D1, the seawater carbon storage amount D2, the external factor data D3, the terrestrial-derived carbon storage amount D4, and the bottom-mud-derived carbon storage amount D5, in addition to the BC-derived carbon storage amount D6.

[0046] The communication unit 24 is realized by a communication module of a computer. The communication unit 24 connects to the measurement device 10 via the network N and acquires the bottom-mud-derived substance concentration D1 and the seawater carbon storage amount D2 from the measurement device 10. Note that a server (not shown) connected to the network N may be provided, and the bottom-mud-derived substance concentration D1 may be acquired via the server.

[0047] The display unit 25 is realized by an output device of a computer. The display unit 25 displays a UI screen under the control of the display control unit 224.

[0048] <Method of measuring carbon stocks using Carbon Stock Measurement System 1> FIG. 2 is a flowchart illustrating an example of a carbon stock measurement method performed by the carbon stock measurement system 1. As shown in FIG.

[0049] The carbon stock measurement method is executed, for example, in response to a predetermined operation by an operator on the carbon stock calculation device 20.

[0050] First, the input unit 21 receives input of external factor data D3 from an operator and outputs it to the first calculation unit 221 of the processing unit 22 (step S1).

[0051] Next, the first calculation unit 221 calculates the amount of terrestrial carbon stock D4 that has flowed into the ocean based on the external factor data D3, and outputs it to the third calculation unit 223 (step S2).

[0052] Next, the communication unit 24 connects to the measuring device 10 via the network N, acquires the bottom mud-derived substance concentration D1 and the amount of carbon stored in seawater D2 estimated by the measuring device 10, and outputs the bottom mud-derived substance concentration D1 to the second calculation unit 222 and the amount of carbon stored in seawater D2 to the third calculation unit 223 (step S3).

[0053] Next, the second calculation unit 222 calculates the amount of carbon storage derived from the bottom mud D5 based on the concentration D1 of the substance derived from the bottom mud, and outputs it to the third calculation unit 223 (step S4).

[0054] Next, the third calculation unit 223 calculates the BC-derived carbon storage amount D6 by subtracting the terrestrial-derived carbon storage amount D4 input from the first calculation unit 221 and the bottom sediment-derived carbon storage amount D5 input from the second calculation unit 222 from the seawater carbon storage amount D2, and outputs and stores this in the memory unit 23 (step S5). This completes the description of the carbon storage amount measurement method using the carbon storage amount measurement system 1. According to this carbon storage amount measurement method, it is possible to accurately estimate the BC-derived carbon storage amount D6 in a marine area. Furthermore, in the past, in order to measure the BC-derived carbon stock D6 in marine areas, expensive equipment capable of highly accurate predictions was sometimes installed in the marine area, but the equipment was subject to wear and deterioration due to seawater currents and wind and rain in marine areas, requiring maintenance of the equipment and resulting in increased costs for maintaining the equipment. However, according to the present invention, the measurement device can be a simple device such as an absorbance meter or fluorometer. It can also be used outside the sea. As a result, the BC-derived carbon stock D6 can be easily estimated using the present invention.

[0055] 3 shows a display example of the UI screen 1000. The UI screen 1000 is displayed on the display unit 25 in response to a predetermined operation on the carbon stock calculation device 20 by an operator.

[0056] The UI screen 1000 has a measurement value display field 1001 that displays the current values ​​of seawater carbon storage D2, terrestrial carbon storage D4, bottom sediment carbon storage D5, and BC-derived carbon storage D6, and a trend graph display field 1002 that displays a graph showing their changes over time.

[0057] On the UI screen 1000, the operator can check the current BC-derived carbon storage amount D6 and the seawater carbon storage amount D2, terrestrial carbon storage amount D4, and bottom sediment carbon storage amount D5 that were used as the basis for its calculation, and can also check the time series changes in the BC-derived carbon storage amount D6.

[0058] The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with or add to the configuration of another embodiment. [Explanation of symbols]

[0059] 1 Carbon storage measurement system, 10 Measuring device, 11 Preprocessing unit, 20 Carbon storage calculation unit, 21 Input unit, 22 Processing unit, 221 First calculation unit, 222 Second calculation unit, 223 Third calculation unit, 224 Display control unit, 23 Memory unit, 24 Communication unit, 25 Display unit, 1000 UI screen, 1001 Measurement value display field, 1002 Trend graph display field, D1 Bottom sediment-derived substance concentration, D2 Carbon storage in seawater, D3 External factor data, D4 Terrestrial-derived carbon storage, D5 Bottom sediment-derived carbon storage, D6 BC-derived carbon storage

Claims

1. a first estimation unit that estimates the concentration of substances derived from bottom mud based on measurement values ​​that represent the characteristics of seawater in the sea area that is the subject of investigation; a second estimation unit that estimates the amount of carbon stored in seawater based on the measurement value; a first calculation unit that calculates the terrestrial carbon stock in the marine area based on external factor data for the marine area; A second calculation unit that calculates the amount of carbon storage derived from bottom mud in the sea area based on the concentration of the bottom mud-derived substance; a third calculation unit that calculates the amount of blue carbon-derived carbon stock by subtracting the amount of terrestrial carbon stock and the amount of sediment-derived carbon stock from the amount of seawater carbon stock; A carbon storage measurement system equipped with:

2. The carbon stock measurement system according to claim 1, The seawater properties include at least one of absorbance, fluorescence intensity, turbidity, and conductivity. Carbon storage measurement system.

3. The carbon stock measurement system according to claim 1, a measuring device that measures the measurement value that represents the property of the seawater; The measurement device periodically measures the measurement value. Carbon storage measurement system.

4. The carbon stock measurement system according to claim 3, The measurement device includes at least one of the first estimating unit and the second estimating unit. Carbon storage measurement system.

5. The carbon stock measurement system according to claim 3, the measurement device has a pre-processing unit that performs pre-processing prior to measuring the characteristic, The pretreatment section performs at least one of a concentration process and a labeling agent addition process as the pretreatment. Carbon storage measurement system.

6. The carbon stock measurement system according to claim 3, The measuring device collects seawater from a plurality of locations at different depths and measures the characteristics. Carbon storage measurement system.

7. The carbon stock measurement system according to claim 1, The first estimation unit estimates a hydrogen sulfide concentration as the bottom mud-derived substance concentration. Carbon storage measurement system.

8. The carbon stock measurement system according to claim 1, The external factor data includes at least one of the organic matter concentration near the river mouth, the flow rate of the inflowing river, the amount of precipitation in the river basin, the amount of treated water discharged from a sewage treatment facility connected to the inflowing river, the water quality of the treated water, topography and land use data of the basin, wind direction, wind speed, seawater temperature, and ocean current in the sea area. Carbon storage measurement system.

9. The carbon stock measurement system according to claim 1, a storage unit that stores the calculated amount of carbon stored derived from blue carbon; and a display control unit that displays the time-series change in the amount of carbon stock derived from blue carbon on a UI screen. Carbon storage measurement system.

10. A carbon stock measurement method using a carbon stock measurement system, The concentration of substances derived from bottom sediment is estimated based on measurements that represent the characteristics of the seawater in the surveyed sea area. Estimating the amount of carbon stored in seawater based on the measured values; Calculating the amount of terrestrial carbon stocks in the marine area based on external factor data for the marine area; Calculating the amount of carbon stored in the sea area derived from bottom mud based on the concentration of the bottom mud-derived substance; The amount of carbon stock derived from blue carbon is calculated by subtracting the amount of carbon stock derived from land and the amount of carbon stock derived from bottom sediment from the amount of carbon stock in seawater. A carbon stock measurement method including steps.

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