气候变化领域集成服务门户(CCPortal): Carbon: Chlorophyll Ratios and Net Primary Productivity of Subarctic Pacific Surface Waters Derived From Autonomous Shipboard Sensors

CCPortal

DOI	10.1002/2017GB005783
	Carbon: Chlorophyll Ratios and Net Primary Productivity of Subarctic Pacific Surface Waters Derived From Autonomous Shipboard Sensors
	Burt W.J.; Westberry T.K.; Behrenfeld M.J.; Zeng C.; Izett R.W.; Tortell P.D.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	267
结束页码	288
卷号	32 期号:2
英文摘要	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 macronutrient and micronutrient limitations and submesoscale hydrographic frontal zones. Throughout the majority of our survey region, carbon to chlorophyll ratios (Cphyto:Chl) ranged between 50 and 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 to 80 in high nutrient low Chl waters in June and from 80 to 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., photoacclimation), 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 macronutrient concentrations. In contrast, iron-limited waters exhibited Cphyto:Chl ratios lower than predicted from the photoacclimation 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. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	absorption; backscattering; C:Chl; chlorophyll; phytoplankton carbon; subarctic Pacific
语种	英语
scopus关键词	adsorption; backscatter; carbon sequestration; chlorophyll a; net primary production; physiological response; phytoplankton; sensor; subarctic region; surface water; trace element; upwelling; British Columbia; Canada; Gulf of Alaska; Pacific Ocean; Pacific Ocean (Subarctic); Vancouver Island
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129858
作者单位	Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, United States; School of Ocean and Earth Science, Tongji University, Shanghai, China; Botany Department, University of British Columbia, Vancouver, BC, Canada; Peter Wall Institute for Advanced Studies, University of British Columbia, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Burt W.J.,Westberry T.K.,Behrenfeld M.J.,et al. Carbon: Chlorophyll Ratios and Net Primary Productivity of Subarctic Pacific Surface Waters Derived From Autonomous Shipboard Sensors[J],2018,32(2).
APA	Burt W.J.,Westberry T.K.,Behrenfeld M.J.,Zeng C.,Izett R.W.,&Tortell P.D..(2018).Carbon: Chlorophyll Ratios and Net Primary Productivity of Subarctic Pacific Surface Waters Derived From Autonomous Shipboard Sensors.Global Biogeochemical Cycles,32(2).
MLA	Burt W.J.,et al."Carbon: Chlorophyll Ratios and Net Primary Productivity of Subarctic Pacific Surface Waters Derived From Autonomous Shipboard Sensors".Global Biogeochemical Cycles 32.2(2018).