气候变化领域集成服务门户(CCPortal): Fram Strait sea ice export variability over the last 80 years

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.868944
	Fram Strait sea ice export variability over the last 80 years
	Smedsrud; Lars Henrik; Halvorsen; Mari H; Stroeve; Julienne C; Zhang; Rong; Kloster; Kjell
发布日期	2016-12-01
数据集类型	dataset
英文简介	A new long-term data record of Fram Strait sea ice area export from 1935 to 2014 is developed using a combination of satellite radar images and station observations of surface pressure across Fram Strait. This data record shows that the long-term annual mean export is about 880?000 km2, representing 10 % of the sea-ice-covered area inside the basin. The time series has large interannual and multi-decadal variability but no long-term trend. However, during the last decades, the amount of ice exported has increased, with several years having annual ice exports that exceeded 1 million km2. This increase is a result of faster southward ice drift speeds due to stronger southward geostrophic winds, largely explained by increasing surface pressure over Greenland. Evaluating the trend onwards from 1979 reveals an increase in annual ice export of about +6 % per decade, with spring and summer showing larger changes in ice export (+11 % per decade) compared to autumn and winter (+2.6 % per decade). Increased ice export during winter will generally result in new ice growth and contributes to thinning inside the Arctic Basin. Increased ice export during summer or spring will, in contrast, contribute directly to open water further north and a reduced summer sea ice extent through the ice?albedo feedback. Relatively low spring and summer export from 1950 to 1970 is thus consistent with a higher mid-September sea ice extent for these years. Our results are not sensitive to long-term change in Fram Strait sea ice concentration. We find a general moderate influence between export anomalies and the following September sea ice extent, explaining 18?% of the variance between 1935 and 2014, but with higher values since 2004.
空间范围	Median Latitude: 79.000000 * Median Longitude: -5.000000 * South-bound Latitude: 79.000000 * West-bound Longitude: -15.000000 * North-bound Latitude: 79.000000 * East-bound Longitude: 5.000000
时间范围	1935-01-01T00:00:00 - 2014-01-01T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216704
推荐引用方式 GB/T 7714	Smedsrud,Lars Henrik,Halvorsen,et al. Fram Strait sea ice export variability over the last 80 years.2016-12-01.https://doi.org/10.1594/PANGAEA.868944.