气候变化领域集成服务门户(CCPortal): Carbon:Chlorophyll ratios of Subarctic Pacific surface waters

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.886143
	Carbon:Chlorophyll ratios of Subarctic Pacific surface waters
	Burt; William J; Westberry; Toby K; Behrenfeld; Michael J; Zeng; Chen; Izett; Robert; Tortell; Philippe Daniel
发布日期	2018-02-13
数据集类型	dataset
英文简介	We present optically-derived estimates of phytoplankton carbon (Cphyto) and chlorophyll a concentration (Chl) across a wide range of productivity and hydrographic regimes in the Subarctic Pacific Ocean. Our high-frequency measurements capture changes in Cphyto and Chl across regional gradients in macro- and micronutrient limitation, and sub-mesoscale hydrographic frontal zones. Throughout the majority of our survey region, carbon to chlorophyll ratios (Cphyto:Chl) ranged between 50-100. Lower values (10-20) were constrained to the highly productive coastal upwelling system along Vancouver Island, whereas higher estimated values (>200) were found directly off the southern British Columbia continental shelf. Further offshore, Cphyto:Chl was less variable, ranging from 50-80 in high nutrient low Chl (HNLC) waters in June, and from 80-120 in the Gulf of Alaska in July. Much of the variability in Cphyto:Chl throughout the study region could be explained by mixed layer light levels (i.e. photo-acclimation), with additional variability attributed to nutrient-controlled changes in phytoplankton growth rates in some regions. Elevated Cphyto:Chl ratios resulting from apparent nutrient stress were found in areas of low macro-nutrient concentrations. In contrast, iron-limited waters exhibited Cphyto:Chl ratios lower than predicted from the photo-acclimation model. Applying the Carbon-based production model, we derived Cphyto and Chl-based estimates of net primary productivity, which showed good coherence with independent 14C uptake measurements. Our results highlight the utility of ship-board optical data to examine phytoplankton physiological ecology and productivity in surface marine waters.
空间范围	Median Latitude: 51.193487 * Median Longitude: -131.536634 * South-bound Latitude: 48.007000 * West-bound Longitude: -147.878000 * North-bound Latitude: 58.867000 * East-bound Longitude: -124.363000
时间范围	2016-05-26T00:50:15 - 2016-07-25T22:04:30
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/216298
推荐引用方式 GB/T 7714	Burt,William J,Westberry,et al. Carbon:Chlorophyll ratios of Subarctic Pacific surface waters.2018-02-13.https://doi.org/10.1594/PANGAEA.886143.