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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Format: | Report |
Language: | English |
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COPERNICUS GESELLSCHAFT MBH
2019
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Online Access: | http://ir.qdio.ac.cn/handle/337002/154923 http://ir.qdio.ac.cn/handle/337002/154924 https://doi.org/10.5194/tc-13-1025-2019 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/154923 2023-05-15T15:34:59+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 http://ir.qdio.ac.cn/handle/337002/154923 http://ir.qdio.ac.cn/handle/337002/154924 https://doi.org/10.5194/tc-13-1025-2019 英语 eng COPERNICUS GESELLSCHAFT MBH CRYOSPHERE http://ir.qdio.ac.cn/handle/337002/154923 http://ir.qdio.ac.cn/handle/337002/154924 doi:10.5194/tc-13-1025-2019 Physical Geography Geology Geography Physical Geosciences Multidisciplinary 期刊论文 2019 ftchinacasciocas https://doi.org/10.5194/tc-13-1025-2019 2022-06-27T05:38:33Z 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 205.8(+/- 74.7) x 10(3) km(2) and 55.2(+/- 17.8) x 10(3) 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 394.3(+/- 110.2) x 10(3) 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 x 10(3), 82.2 x 10(3), and 7.5 x 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. Report Baffin Bay Baffin Bay Baffin Jones Sound Lancaster Sound Nares strait Sea ice Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR 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 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
spellingShingle |
Physical Geography Geology Geography Physical Geosciences Multidisciplinary 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 |
topic_facet |
Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
description |
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 205.8(+/- 74.7) x 10(3) km(2) and 55.2(+/- 17.8) x 10(3) 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 394.3(+/- 110.2) x 10(3) 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 x 10(3), 82.2 x 10(3), and 7.5 x 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 |
Report |
author |
Bi, Haibo Zhang, Zehua Wang, Yunhe Xu, Xiuli Liang, Yu Huang, Jue Liu, Yilin Fu, Min |
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 |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2019 |
url |
http://ir.qdio.ac.cn/handle/337002/154923 http://ir.qdio.ac.cn/handle/337002/154924 https://doi.org/10.5194/tc-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_relation |
CRYOSPHERE http://ir.qdio.ac.cn/handle/337002/154923 http://ir.qdio.ac.cn/handle/337002/154924 doi:10.5194/tc-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_ |
1766365237473181696 |