Initial development and laboratory testing of a ChLorophyll Absorption Meter (CLAM)

GSTDTAP

项目编号	NE/P003443/1
	Initial development and laboratory testing of a ChLorophyll Absorption Meter (CLAM)
	[unavailable]
主持机构	Plymouth Marine Laboratory
项目开始年	2016
	2016-06-30
项目结束日期	2017-06-29
资助机构	UK-NERC
项目类别	Research Grant
国家	英国
语种	英语
英文摘要	Invisible microscopic algae in the ocean and freshwaters (phytoplankton) are plants that photosynthesise by absorbing solar radiation. In doing so, they provide half of the oxygen we breathe, they support marine ecosystem and the fisheries upon which we depend on, and absorb large quantities of CO2 from the atmosphere. Thus phytoplankton are a crucial component of oceanic and freshwater ecosystems that sustains human population. To be able to effectively predict future changes in phytoplankton and manage environmental resources, it is therefore fundamental to accurately quantify the current stocks and variability of microscopic algae living in marine and freshwater bodies. Since all phytoplankton are provided with the photosynthetic pigment chlorophyll-a, the concentration of this pigment (chl) is typically used as a proxy for phytoplankton biomass. However, current methods to determine chl either rely on laborious and expensive collection and laboratory analyses of discrete water samples, or on highly-inaccurate in-situ measurements of chlorophyll fluorescence. Although in-situ fluorescence has the advantage of providing high-resolution measurements, it is affected by phytoplankton physiological processes that render in-situ fluorescence-based estimates of chl highly inaccurate, even if calibrated using collocated discrete data. For example, the ratio of fluorescence to chlorophyll-a concentration can vary by up to a factor 6 due to variations in solar irradiance. As a consequence, accurate chl estimates are currently extremely scarce preventing effective management of water resources. The overall objective of this project is to develop and test a prototype of an instrument that ultimately will provide high-resolution in-situ estimates of chl in with unprecedented accuracy. Specifically, we will develop an initial laboratory prototype which will undergo multiple tests and improvements to achieve highly stable and highly accurate measurements of chl. We envision that this instrument could become the new standard method for automatically measuring chl in situ and in the laboratory. This instrument could also be deployed in continuous mode on ships and on autonomous platforms such as gliders and profiling floats, thus greatly extending the availability of highly-accurate and high-resolution in-situ measurements of chl.
来源学科分类	Natural Environment Research
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/86246
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	[unavailable].Initial development and laboratory testing of a ChLorophyll Absorption Meter (CLAM).2016.