气候变化领域集成服务门户(CCPortal): The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air

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DOI	https://doi.org/10.1594/PANGAEA.859853
	The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air–sea exchange processes
	Engel; Anja; Galgani; Luisa
发布日期	2016-04-19
数据集类型	dataset
英文简介	The sea-surface microlayer (SML) is at the upper- most surface of the ocean, linking the hydrosphere with the atmosphere. The presence and enrichment of organic compounds in the SML have been suggested to influence air– sea gas exchange processes as well as the emission of primary organic aerosols. Here, we report on organic matter components collected from an approximately 50µm thick SML and from the underlying water (ULW), ca. 20 cm below the SML, in December 2012 during the SOPRAN METEOR 91 cruise to the highly productive, coastal upwelling regime off the coast of Peru. Samples were collected at 37 stations including coastal upwelling sites and off-shore stations with less organic matter and were analyzed for total and dissolved high molecular weight (> 1 kDa) combined carbohydrates (TCCHO, DCCHO), free amino acids (FAA), total and dissolved hydrolyzable amino acids (THAA, DHAA), transparent exopolymer particles (TEP), Coomassie stainable particles (CSPs), total and dissolved organic carbon (TOC, DOC), total and dissolved nitrogen (TN, TDN), as well as bacterial and phytoplankton abundance. Our results showed a close coupling between organic matter concentrations in the water column and in the SML for almost all components except for FAA and DHAA that showed highest enrichment in the SML on average. Accumulation of gel particles (i.e., TEP and CSP) in the SML differed spatially. While CSP abundance in the SML was not related to wind speed, TEP abundance decreased with wind speed, leading to a depletion of TEP in the SML at about 5 m s-1 . Our study provides insight to the physical and biological control of organic matter enrichment in the SML, and discusses the potential role of organic matter in the SML for air–sea exchange processes.
空间范围	Median Latitude: -10.744558 * Median Longitude: -78.857649 * South-bound Latitude: -16.155870 * West-bound Longitude: -82.000180 * North-bound Latitude: -5.000030 * East-bound Longitude: -75.364444
时间范围	2012-12-03T16:30:00 - 2012-12-23T21:33:00
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/215411
推荐引用方式 GB/T 7714	Engel,Anja,Galgani,等. The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air–sea exchange processes.2016-04-19.https://doi.org/10.1594/PANGAEA.859853.