Variations in colored dissolved organic matter between boreal lakes studied by satellite remote sensing

There have been major improvements in our understanding of the role of lakes and impoundments in global carbon cycle. Estimating the true role of lakes as sentinels, regulators and integrators of climate change requires analyzing carbon content of vast number of lakes. This is not realistic without using remote sensing methods. There are no satellite sensors at the moment that provide full global coverage and at the same time have spatial and radiometric resolutions suitable for lake color dissolved organic matter (CDOM) mapping. Therefore, the global study has to be performed using more sensitive sensors to create regional lake CDOM statistics for as many sites as possible and extrapolating the results on global lake map that can be created from less sensitive sensor data with full global coverage (Landsat). As a first step towards the global lake carbon mapping we show that the Advanced Land Imager (ALI) allows to study regional variations in lake CDOM content and consequently estimate closely correlated DOC (dissolved organic carbon) and CO 2 saturation values. The results show also that there may be regional differences in lake CDOM content even if the study sites are geographically relatively close to each other and occupying zones with similar land cover and annual runoff. In one occasion the difference can be explained with human impact that has caused acidification of lakes but the other occasion needs further studies.

[1]  S. Adler-Golden,et al.  Atmospheric Correction for Short-wave Spectral Imagery Based on MODTRAN 4 , 2000 .

[2]  M. Morana,et al.  A refined empirical line approach for reflectance factor retrieval from Landsat-5 TM and Landsat-7 ETM + , 2001 .

[3]  Tiit Kutser,et al.  Mapping lake CDOM by satellite remote sensing , 2005 .

[4]  O. Edenhofer,et al.  Mitigation from a cross-sectoral perspective , 2007 .

[5]  Marvin E. Bauer,et al.  Influence of Chlorophyll and Colored Dissolved Organic Matter (CDOM) on Lake Reflectance Spectra: Implications for Measuring Lake Properties by Remote Sensing , 2006 .

[6]  Jonathan J. Cole,et al.  Patterns and regulation of dissolved organic carbon: An analysis of 7,500 widely distributed lakes , 2007 .

[7]  T. Kutser,et al.  Telespectrometrical estimation of water transparency, chlorophyll-a and total phosphorus concentration of Lake Peipsi , 1995 .

[8]  W. Collins,et al.  Global climate projections , 2007 .

[9]  J. Pulliainen,et al.  Retrieval of water quality from airborne imaging spectrometry of various lake types in different seasons. , 2001, The Science of the total environment.

[10]  Gail P. Anderson,et al.  Atmospheric correction for shortwave spectral imagery based on MODTRAN4 , 1999, Optics & Photonics.

[11]  Tiit Kutser,et al.  Using Satellite Remote Sensing to Estimate the Colored Dissolved Organic Matter Absorption Coefficient in Lakes , 2005, Ecosystems.

[12]  T. Kutser,et al.  A hyperspectral model for interpretation of passive optical remote sensing data from turbid lakes. , 2001, The Science of the total environment.

[13]  Tiit Kutser,et al.  Quantitative detection of chlorophyll in cyanobacterial blooms by satellite remote sensing , 2004 .

[14]  J. Downing,et al.  The global abundance and size distribution of lakes, ponds, and impoundments , 2006 .

[15]  L. Tranvik,et al.  The catchment and climate regulation of pCO2 in boreal lakes , 2003 .

[16]  L. Tranvik.  Bacterioplankton Growth on Fractions of Dissolved Organic Carbon of Different Molecular Weights from Humic and Clear Waters , 1990, Applied and environmental microbiology.

[17]  John M. Melack,et al.  Lakes and reservoirs as regulators of carbon cycling and climate , 2009 .

[18]  J. Downing,et al.  Plumbing the Global Carbon Cycle: Integrating Inland Waters into the Terrestrial Carbon Budget , 2007, Ecosystems.

[19]  K. Rose,et al.  Modeling dissolved organic carbon in subalpine and alpine lakes with GIS and remote sensing , 2009, Landscape Ecology.

[20]  J. Downing,et al.  Sediment organic carbon burial in agriculturally eutrophic impoundments over the last century , 2008 .

[21]  Linkages between weather, dissolved organic carbon, and cold-water habitat in a Boreal Shield lake recovering from acidification , 2005 .