Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer

Shaojun Zheng; Jiuxin Shi; Yutian Jiao; Renfeng Ge

doi:10.1007/s00343-011-0318-x

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Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer

Updated：2023-05-16

- Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer
- Journal of Oceanology and Limnology Vol. 29, Issue 6, Pages: 1325-1338(2011)
- Affiliations：
  
  1. Key Laboratory of Physical Oceanography Ministry of Education Ocean University of China
  2. First Institute of Oceanography State Oceanic Administration
- Author bio：
- Funds：
- DOI：10.1007/s00343-011-0318-x
  CLC：
- Online First：25 October 2011，
  
  Published：2011
- Accepted：
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Zheng, S., Shi, J., Jiao, Y. et al. Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer., Chin. J. Ocean. Limnol. 29, 1325–1338 (2011). https://doi.org/10.1007/s00343-011-0318-x
DOI：

Zheng, S., Shi, J., Jiao, Y. et al. Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer., Chin. J. Ocean. Limnol. 29, 1325–1338 (2011). https://doi.org/10.1007/s00343-011-0318-x DOI：

摘要

Abstract

As a unique low-temperature water mass in Antarctic coastal region

the Ice Shelf Water (ISW) is an important component for the formation of the Antarctic Bottom Water (AABW). In this paper

we present a criterion for ISW identification based on freezing point at the sea surface

and we study spatial distribution of ISW in front of the Amery Ice Shelf (AIS) and its flow path in Prydz Bay by analyzing hydrographic data from Australian cruises in 2001 and 2002

as well as Chinese cruises in 2003

2005

2006

and 2008

all being made in the austral summer. The relatively cold and fresh ISW occurred as several discrete water blocks with cold cores in front of the AIS

within the depth range of 100–600 m

under the seasonal thermocline. ISW had obvious temporal and spatial variations and the spatial distribution pattern changed greatly after 2005. Most of ISW was concentrated west of 73°E during 2001 to 2003 and 2006

but it was widespread to east in 2005 and 2008. In all observation years

a small amount of cold ISW always occurs at the west end of the AIS front section

where the coldest ISW in the whole section also occurred in 2001

2003 and 2006. Considering general cyclonic circulation pattern under the AIS

the ISW flowing out from west end of the AIS front might have experienced the longest cooling period under ice shelf

so it would have the lowest temperature. Analysis of data from meridian sections in Prydz Bay in 2003 implied that ISW in the west could spread north to the continental break along the east flank of the Fram Bank near 70.5°E

mix with the upwelling Circumpolar Deep Water and possibly contribute to the formation of AABW.

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Keywords

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