Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017
Baffin Bay serves as a huge reservoir of sea ice which would provide the solid freshwater sources to the seas downstream. By employing satellite-derived sea ice motion and concentration fields, we obtain a nearly 40-year-long record (1978–1979 to 2016–2017) of the sea ice area flux through key fluxg...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
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2019
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Online Access: | https://doi.org/10.5194/tc-13-1025-2019 https://tc.copernicus.org/articles/13/1025/2019/ |
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Open Polar |
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Copernicus Publications: E-Journals |
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English |
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Baffin Bay serves as a huge reservoir of sea ice which would provide the solid freshwater sources to the seas downstream. By employing satellite-derived sea ice motion and concentration fields, we obtain a nearly 40-year-long record (1978–1979 to 2016–2017) of the sea ice area flux through key fluxgates of Baffin Bay. Based on the estimates, the Baffin Bay sea ice area budget in terms of inflow and outflow are quantified and possible causes for its interannual variations and trends are analyzed. On average, the annual (September–August) inflows through the northern gate and Lancaster Sound are on the order of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">205.8</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">74.7</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="94pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="d70f40737eb8af314ae6297545c11d8a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00001.svg" width="94pt" height="15pt" src="tc-13-1025-2019-ie00001.png"/></svg:svg> km 2 and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">55.2</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">17.8</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="88pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="87e1710333a5b7ad5554ea1139c3958d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00002.svg" width="88pt" height="15pt" src="tc-13-1025-2019-ie00002.png"/></svg:svg> km 2 . In particular, a comparison with published results seems to suggest that about 75 %–85 % of the inflow through the northern gates is newly formed ice produced in the recurring North Water Polynya (NOW), in addition to the inflow via Nares Strait and Jones Sound. Meanwhile, the mean outflow via the southern gate approaches <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">394.3</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">110.2</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="100pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="52f9186cb9b001e003c77c687b820a99"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00003.svg" width="100pt" height="15pt" src="tc-13-1025-2019-ie00003.png"/></svg:svg> km 2 . The distinct interannual variability for ice area flux through the northern gate and southern gate is partly explained by wind forcing associated with cross-gate sea level pressure difference, with correlations of 0.62 and 0.68, respectively. Also, significant increasing trends are found for the annual sea ice area flux through the three gates, amounting to 38.9×10 3 , 82.2×10 3 , and 7.5×10 3 km 2 decade −1 for the northern gate, southern gate, and Lancaster Sound. These trends are chiefly related to the increasing ice motion, which is associated with thinner ice owing to the warmer climate (i.e., higher surface air temperature and shortened freezing period) and increased air and water drag coefficients over the past decades. |
format |
Text |
author |
Bi, Haibo Zhang, Zehua Wang, Yunhe Xu, Xiuli Liang, Yu Huang, Jue Liu, Yilin Fu, Min |
spellingShingle |
Bi, Haibo Zhang, Zehua Wang, Yunhe Xu, Xiuli Liang, Yu Huang, Jue Liu, Yilin Fu, Min Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
author_facet |
Bi, Haibo Zhang, Zehua Wang, Yunhe Xu, Xiuli Liang, Yu Huang, Jue Liu, Yilin Fu, Min |
author_sort |
Bi, Haibo |
title |
Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
title_short |
Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
title_full |
Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
title_fullStr |
Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
title_full_unstemmed |
Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
title_sort |
baffin bay sea ice inflow and outflow: 1978–1979 to 2016–2017 |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1025-2019 https://tc.copernicus.org/articles/13/1025/2019/ |
long_lat |
ENVELOPE(-86.000,-86.000,76.002,76.002) ENVELOPE(-83.999,-83.999,74.218,74.218) ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Baffin Bay Jones Sound Lancaster Sound Nares |
geographic_facet |
Baffin Bay Jones Sound Lancaster Sound Nares |
genre |
Baffin Bay Baffin Bay Baffin Jones Sound Lancaster Sound Nares strait Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Jones Sound Lancaster Sound Nares strait Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-13-1025-2019 https://tc.copernicus.org/articles/13/1025/2019/ |
op_doi |
https://doi.org/10.5194/tc-13-1025-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
3 |
container_start_page |
1025 |
op_container_end_page |
1042 |
_version_ |
1766365322818879488 |
spelling |
ftcopernicus:oai:publications.copernicus.org:tc70113 2023-05-15T15:35:02+02:00 Baffin Bay sea ice inflow and outflow: 1978–1979 to 2016–2017 Bi, Haibo Zhang, Zehua Wang, Yunhe Xu, Xiuli Liang, Yu Huang, Jue Liu, Yilin Fu, Min 2019-03-29 application/pdf https://doi.org/10.5194/tc-13-1025-2019 https://tc.copernicus.org/articles/13/1025/2019/ eng eng doi:10.5194/tc-13-1025-2019 https://tc.copernicus.org/articles/13/1025/2019/ eISSN: 1994-0424 Text 2019 ftcopernicus https://doi.org/10.5194/tc-13-1025-2019 2020-07-20T16:22:53Z Baffin Bay serves as a huge reservoir of sea ice which would provide the solid freshwater sources to the seas downstream. By employing satellite-derived sea ice motion and concentration fields, we obtain a nearly 40-year-long record (1978–1979 to 2016–2017) of the sea ice area flux through key fluxgates of Baffin Bay. Based on the estimates, the Baffin Bay sea ice area budget in terms of inflow and outflow are quantified and possible causes for its interannual variations and trends are analyzed. On average, the annual (September–August) inflows through the northern gate and Lancaster Sound are on the order of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">205.8</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">74.7</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="94pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="d70f40737eb8af314ae6297545c11d8a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00001.svg" width="94pt" height="15pt" src="tc-13-1025-2019-ie00001.png"/></svg:svg> km 2 and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">55.2</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">17.8</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="88pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="87e1710333a5b7ad5554ea1139c3958d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00002.svg" width="88pt" height="15pt" src="tc-13-1025-2019-ie00002.png"/></svg:svg> km 2 . In particular, a comparison with published results seems to suggest that about 75 %–85 % of the inflow through the northern gates is newly formed ice produced in the recurring North Water Polynya (NOW), in addition to the inflow via Nares Strait and Jones Sound. Meanwhile, the mean outflow via the southern gate approaches <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">394.3</mn><mo>(</mo><mo>±</mo><mn mathvariant="normal">110.2</mn><mo>)</mo><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">3</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="100pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="52f9186cb9b001e003c77c687b820a99"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-1025-2019-ie00003.svg" width="100pt" height="15pt" src="tc-13-1025-2019-ie00003.png"/></svg:svg> km 2 . The distinct interannual variability for ice area flux through the northern gate and southern gate is partly explained by wind forcing associated with cross-gate sea level pressure difference, with correlations of 0.62 and 0.68, respectively. Also, significant increasing trends are found for the annual sea ice area flux through the three gates, amounting to 38.9×10 3 , 82.2×10 3 , and 7.5×10 3 km 2 decade −1 for the northern gate, southern gate, and Lancaster Sound. These trends are chiefly related to the increasing ice motion, which is associated with thinner ice owing to the warmer climate (i.e., higher surface air temperature and shortened freezing period) and increased air and water drag coefficients over the past decades. Text Baffin Bay Baffin Bay Baffin Jones Sound Lancaster Sound Nares strait Sea ice Copernicus Publications: E-Journals Baffin Bay Jones Sound ENVELOPE(-86.000,-86.000,76.002,76.002) Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) Nares ENVELOPE(158.167,158.167,-81.450,-81.450) The Cryosphere 13 3 1025 1042 |