Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Reflectance properties of hydrographically and optically stratified fjords (Scottish sea lochs) during the spring diatom bloom

Cunningham, A. and Wood, P and Jones, K. (2001) Reflectance properties of hydrographically and optically stratified fjords (Scottish sea lochs) during the spring diatom bloom. International Journal of Remote Sensing, 22. pp. 2885-2897. ISSN 0143-1161

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

Reflectance spectra of Scottish sea lochs were measured using a specially constructed floating spectroradiometer with a bandpass of 400-800 nm and 4 nm resolution over a period of 10 weeks during the development of a Spring diatom bloom. Most stations showed marked salinity stratification with high surface gelbstoff concentrations and chlorophyll levels up to 80 g l-1. Characteristic features of the reflectance spectra included very low values in the blue, a maximum around 600 nm and distinct solar stimulated fluorescence peaks at 685 nm. The height of the fluorescence peak (scaled by dividing by the maximum reflectance value) was well correlated with near-surface chlorophyll concentrations. The ratio of reflectances at 400 and 650 nm could be used as an indicator of surface gelbstoff concentration. However the commonly observed correlation between the blue/green reflectance ratio (443 nm:555 nm) and surface chlorophyll concentration held only at stations where a surface layer of low-salinity, high gelbstoff water was not present. Calculations of the diffuse attenuation coefficient at 440 nm showed that layers with the highest chlorophyll concentrations were frequently located below one optical depth in the water column, implying that much of the phytoplankton biomass in these waters would not be detectable by optical remote sensing.