气候变化领域集成服务门户(CCPortal): Calving Event Led to Changes in Phytoplankton Bloom Phenology in the Mertz Polynya, Antarctica

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DOI	10.1029/2020JC016387
	Calving Event Led to Changes in Phytoplankton Bloom Phenology in the Mertz Polynya, Antarctica
	Liniger G.; Strutton P.G.; Lannuzel D.; Moreau S.
发表日期	2020
ISSN	21699275
卷号	125 期号:11
英文摘要	Polynyas are subject to variability in winds and ocean circulation and are important sites of ecological productivity. In February 2010, the B09B iceberg collided with the Mertz Glacier Tongue (MGT), calving a 78 × 40-km giant iceberg which modified the icescape and primary productivity of the Mertz polynya. In this study, we use satellite ocean color and sea ice concentration to investigate the variability, trends, and drivers of phytoplankton blooms in the Mertz polynya since 1997. During the bloom, over 21 years, we found (i) a later ice retreat time, (ii) an increase in sea ice concentration, (iii) a decrease in open-water period, (iv) a later bloom start, and (v) a decrease in bloom duration. Our results suggest that major postcalving changes in the physical characteristics of the polynya, mainly its icescape, are the primary drivers of phytoplankton phenology. More specifically, the MGT calving event resulted in significant seasonal and regional changes, with higher eastern chl-a and mean summer chl-a postcalving. While satellite data are useful to study long-term variability in these inhospitable areas, they only focus on the ocean surface and are obscured by ice and clouds. Additional subsurface parameters from seal tags, gliders and moorings in the southernmost polar regions would strengthen our comprehension of phytoplankton and physical changes in ocean dynamics that may have far-reaching consequences, from global circulation to carbon export. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	bloom phenology; calving; phytoplankton; polynyas
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186578
作者单位	Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; Australian Research Council Centre of Excellence for Climate Extremes, University of Tasmania, Hobart, TAS, Australia; Norwegian Polar Institute, Tromsø, Norway
推荐引用方式 GB/T 7714	Liniger G.,Strutton P.G.,Lannuzel D.,et al. Calving Event Led to Changes in Phytoplankton Bloom Phenology in the Mertz Polynya, Antarctica[J],2020,125(11).
APA	Liniger G.,Strutton P.G.,Lannuzel D.,&Moreau S..(2020).Calving Event Led to Changes in Phytoplankton Bloom Phenology in the Mertz Polynya, Antarctica.Journal of Geophysical Research: Oceans,125(11).
MLA	Liniger G.,et al."Calving Event Led to Changes in Phytoplankton Bloom Phenology in the Mertz Polynya, Antarctica".Journal of Geophysical Research: Oceans 125.11(2020).