气候变化领域集成服务门户(CCPortal): Classification of Sea Ice Summer Melt Features in High-Resolution IceBridge Imagery

CCPortal

DOI	10.1029/2019JC015738
	Classification of Sea Ice Summer Melt Features in High-Resolution IceBridge Imagery
	Buckley E.M.; Farrell S.L.; Duncan K.; Connor L.N.; Kuhn J.M.; Dominguez R.T.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	High-resolution observations of melt ponds (MPs) across the Arctic are lacking, yet essential for understanding the sea ice energy budget and under-ice ecology. We present a pixel-based classification scheme to identify undeformed and deformed ice, open water, and light, medium, and dark MPs in images of sea ice undergoing melt. The scheme was applied to 0.1-m resolution Operation IceBridge Digital Mapping System imagery covering an area of ~4,000 km2. Observations of both the unconsolidated, marginal ice zone of the Beaufort/Chukchi Seas (B/C Seas) and the consolidated, multiyear ice of the central Arctic (CA) were obtained. Sea ice concentration (SIC), melt pond fraction (MPF), and pond color fraction (PCF) were derived on a per-image basis. SIC averaged 69% in the B/C Seas and 90% in the CA. We find that both MPF and PCF are dependent on the ice type on which ponds form. MPF averaged 25% in the B/C Seas, where dark ponds dominated and had a PCF of 60%, compared to a PCF of 9% and 31%, for medium and light ponds, respectively. MPF averaged 14% in the CA, where the PCF of light ponds was 68%, compared with 16% for both medium and dark ponds. As the multiyear ice of the Arctic Ocean is replaced by a younger, more seasonal ice cover, our results suggest that MPF will increase, and MP color will darken. This would enhance the ice albedo feedback, exacerbating that already due to the multidecadal decline in summer ice extent. © 2020. The Authors.
英文关键词	Arctic; melt pond; remote sensing; sea ice
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/186885
作者单位	Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Department of Geographical Sciences, University of Maryland, College Park, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; NOAA Laboratory for Satellite Altimetry, College Park, MD, United States; Universities Space Research Association; NASA Ames Research Center, Moffett Field, CA, United States
推荐引用方式 GB/T 7714	Buckley E.M.,Farrell S.L.,Duncan K.,et al. Classification of Sea Ice Summer Melt Features in High-Resolution IceBridge Imagery[J],2020,125(5).
APA	Buckley E.M.,Farrell S.L.,Duncan K.,Connor L.N.,Kuhn J.M.,&Dominguez R.T..(2020).Classification of Sea Ice Summer Melt Features in High-Resolution IceBridge Imagery.Journal of Geophysical Research: Oceans,125(5).
MLA	Buckley E.M.,et al."Classification of Sea Ice Summer Melt Features in High-Resolution IceBridge Imagery".Journal of Geophysical Research: Oceans 125.5(2020).