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David Tenenbaum

Professor

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Large-Scale Retrieval of Coloured Dissolved Organic Matter in Northern Lakes Using Sentinel-2 Data

Författare

  • Enass Said. Al-kharusi
  • David E. Tenenbaum
  • Abdulhakim M. Abdi
  • Tiit Kutser
  • Jan Karlsson
  • Ann-kristin Bergström
  • Martin Berggren

Summary, in English

Owing to the significant societal value of inland water resources, there is a need for cost-effective monitoring of water quality on large scales. We tested the suitability of the recently launched Sentinel-2A to monitor a key water quality parameter, coloured dissolved organic matter (CDOM), in various types of lakes in northern Sweden. Values of a(420)CDOM (CDOM absorption at 420 nm wavelength) were obtained by analyzing water samples from 46 lakes in five districts across Sweden within an area of approximately 800 km2. We evaluated the relationships between a(420)CDOM and band ratios derived from Sentinel-2A Level-1C and Level-2A products. The band ratios B2/B3 (460 nm/560 nm) and B3/B5 (560 nm/705 nm) showed poor relationships with a(420)CDOM in Level-1C and 2A data both before and after the removal of outliers. However, there was a slightly stronger power relationship between the atmospherically-corrected B3/B4 ratio and a(420)CDOM (R2 = 0.28, n = 46), and this relationship was further improved (R2 = 0.65, n = 41) by removing observations affected by light haze and cirrus clouds. This study covered a wide range of lakes in different landscape settings and demonstrates the broad applicability of a(420)CDOM retrieval algorithms based on the B3/B4 ratio derived from Sentinel-2A. View Full-Text

Avdelning/ar

  • Institutionen för naturgeografi och ekosystemvetenskap
  • Centrum för miljö- och klimatvetenskap (CEC)
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publiceringsår

2020

Språk

Engelska

Sidor

157-157

Publikation/Tidskrift/Serie

Remote Sensing

Volym

12

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

MDPI AG

Ämne

  • Remote Sensing
  • Geosciences, Multidisciplinary
  • Environmental Sciences

Nyckelord

  • Sweden
  • Earth observation
  • Colored dissolved organic matter
  • Remote sensing

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2072-4292