Method for estimating sea ice output area flux of polar critical channel

A channel and area technology, which is applied in the field of estimation of sea ice output area flux of key channels in polar regions, can solve problems such as low data accuracy and lack of long-term time series results, and achieve high precision and accuracy, easy operation, and high flexibility Effect

Active Publication Date: 2020-02-28
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

The invention solves the problems of low accuracy of basic data and lack of long time series results in sea ice area output flux estimation of key passages (straits, bays, etc.) in polar regions, and is easy to operate and easy to implement

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  • Method for estimating sea ice output area flux of polar critical channel
  • Method for estimating sea ice output area flux of polar critical channel
  • Method for estimating sea ice output area flux of polar critical channel

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the examples. The method steps are described with reference to the accompanying drawings. The channel in the following implementation takes the Davis Strait in the Arctic sea area as an example, which is only used to illustrate the purpose of the present invention, and is not used to limit the scope of the present invention.

[0048] Such as figure 1 As shown, first determine the location of the channel, respectively establish the projected coordinate system corresponding to the sea ice drift velocity and sea ice density data, and find the position of the point covered by the channel in the SIC and SIM data coordinate system. Read the SIC and SIM data of the corresponding grid, calculate the sea ice drift velocity component perpendicular to the channel at the grid, and take the product of the sea ice drift velocity component perpendicular to the channel, time, grid side length and sea i...

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Abstract

The invention relates to a method for estimating the sea ice output area flux of a polar critical channel. The method comprises the steps: sea ice motion (SIM) data and sea ice concentration (SIC) data are obtained based on satellite remote sensing data, grids covered with the channel are determined according to the channel position and the data resolution, the SIM component, perpendicular to thechannel, of each grid is calculated, and the products of the SIM, time, grid edge length and SIC, perpendicular to the channel, of all the grids are accumulated to obtain the sea ice area output fluxof the special channel. The problems that the sea ice area output flux of the critical channel in polar regions is low in basic data estimation precision, and long-time-series results lack are solved,and material balance of sea ice in the polar regions under the new climate environment is advantageously understood; and the method is high in precision, and the sea ice output area flux of any channel in the polar regions can be calculated according to demands.

Description

technical field [0001] The invention relates to a method for estimating the sea ice output area flux of a key channel in polar regions, in particular to a process algorithm for estimating the output area of ​​sea ice in a key channel. Background technique [0002] Under the new climate conditions, polar sea ice plays an important role in indicating global climate change, and has received extensive attention from all sides. Among them, the export of sea ice through each channel is also an important dynamic mechanism affecting the mass change of Arctic sea ice, and plays an important role in maintaining the mass balance of the Arctic Ocean. In addition, the fresh water produced by sea ice export can change the intensity of the radial overturning current in the North Atlantic Ocean. This in turn affects the global ocean thermohaline circulation. The early sea ice migration output observation methods were mostly based on limited on-site buoy and submerged buoy measurement data....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/28G06F17/16G06T3/00G06T7/62
CPCG01B21/28G06F17/16G06T3/0031G06T2207/10032G06T2207/20068G06T2207/30192G06T7/62
Inventor 梁钰毕海波李运玮黄海军
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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