气候变化领域集成服务门户(CCPortal): Daily MODIS composites of thin-ice thickness and ice-surface temperatures for the Southern Weddell Sea

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.848612
	Daily MODIS composites of thin-ice thickness and ice-surface temperatures for the Southern Weddell Sea
	Paul; Stephan; Willmes; Sascha; Heinemann; Günther
发布日期	2015-08-07
数据集类型	dataset
英文简介	Based upon high-resolution thermal-infrared Moderate-Resolution Imaging Spectroradiometer (MODIS) satellite imagery in combination with ERA-Interim atmospheric reanalysis data, we derived long-term polynya parameters such as polynya area, thin-ice thickness distribution and ice-production rates from daily cloud-cover corrected thin-ice thickness composites. Our study is based on a thirteen year investigation period (2002-2014) for the austral winter (1 April to 30 September) in the Antarctic Southern Weddell Sea. The focus lies on coastal polynyas which are important hot spots for new-ice formation, bottom-water formation and heat/moisture release into the atmosphere. MODIS has the capability to resolve even very narrow coastal polynyas. Its major disadvantage is the sensor limitation due to cloud cover. We make use of a newly developed and adapted spatial feature reconstruction scheme to account for cloud-covered areas. We find the sea-ice areas in front of Ronne and Brunt Ice Shelf to be the most active with an annual average polynya area of 3018 ± 1298 and 3516 ± 1420 km2 as well as an accumulated volume ice production of 31 ± 13 and 31 ± 12 km3, respectively. For the remaining four regions, estimates amount to 421 ± 294 km2 and 4 ± 3 km3 (Antarctic Peninsula), 1148 ± 432 km2 and 12 ± 5 km3 (Iceberg A23A), 901 ± 703 km2 and 10 ± 8 km3 (Filchner Ice Shelf) as well as 499 ± 277 km2 and 5 ± 2 km**3 (Coats Land). Our findings are discussed in comparison to recent studies based on coupled sea-ice/ocean models and passive-microwave satellite imagery, each investigating different parts of the Southern Weddell Sea.
空间范围	Median Latitude: -73.500000 * Median Longitude: -42.500000 * South-bound Latitude: -78.000000 * West-bound Longitude: -65.000000 * North-bound Latitude: -69.000000 * East-bound Longitude: -20.000000
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/216985
推荐引用方式 GB/T 7714	Paul,Stephan,Willmes,et al. Daily MODIS composites of thin-ice thickness and ice-surface temperatures for the Southern Weddell Sea.2015-08-07.https://doi.org/10.1594/PANGAEA.848612.