Spatial and interannual variability of dissolved organic matter in the Kolyma River, East Siberia, observed using satellite imagery

[1] The Kolyma River basin in northeastern Siberia, the sixth largest river basin draining to the Arctic Ocean, contains vast reserves of carbon in Pleistocene-aged permafrost soils. Permafrost degradation, as a result of climate change, may cause shifts in riverine biogeochemistry as this old source of organic matter is exposed. Satellite remote sensing offers an opportunity to complement and extrapolate field sampling of dissolved organic matter in this expansive and remote region. We develop empirically based algorithms that estimate chromophoric dissolved organic matter (CDOM) and dissolved organic carbon (DOC) in the Kolyma River and its major tributaries in the vicinity of Cherskiy, Russia. Field samples from July 2008 and 2009 were regressed against spectral data from the Landsat 5 Thematic Mapper and Landsat 7 Enhanced Thematic Mapper-Plus. A combination of Landsat band 3 and bands 2:1 resulted in an R2 of 0.78 between measured CDOM and satellite-derived predictions. Owing to the strong correlation between CDOM and DOC, the resulting maps of the region show strong interannual variability of both CDOM and DOC, and important spatial patterns such as mixing zones at river confluences and downstream loading of DOC. Such variability was previously unobserved through field-based point observations and suggests that current calculations of DOC flux from the Kolyma River to the Arctic Ocean may be underestimates. In this era of rapid climate change, permafrost degradation, and shifts in river discharge, remote sensing of CDOM and DOC offers a powerful, reliable tool to enhance our understanding of carbon cycling in major arctic river systems.

[1]  P. Raymond,et al.  A decrease in discharge‐normalized DOC export by the Yukon River during summer through autumn , 2005 .

[2]  I. Shiklomanov,et al.  Development of a Pan-Arctic Database for River Chemistry , 2008 .

[3]  T. Moore.  Dissolved organic carbon in a northern boreal landscape , 2003 .

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

[5]  J. Rogan,et al.  Remote sensing technology for mapping and monitoring land-cover and land-use change , 2004 .

[6]  F. Pan,et al.  Recent changes in nitrate and dissolved organic carbon export from the upper Kuparuk River, North Slope, Alaska , 2007 .

[7]  Muyin Wang,et al.  A sea ice free summer Arctic within 30 years? , 2009 .

[8]  Eric F. Wood,et al.  A pan‐arctic evaluation of changes in river discharge during the latter half of the 20th century , 2005 .

[9]  Andreas Richter,et al.  The boundless carbon cycle , 2009 .

[10]  L. Smith,et al.  Amplified carbon release from vast West Siberian peatlands by 2100 , 2004 .

[11]  Sarah A. Green,et al.  Optical absorption and fluorescence properties of chromophoric dissolved organic matter in natural waters , 1994 .

[12]  R. Spencer,et al.  Spectrophotometric properties of surface water dissolved organic matter in an afforested upland peat catchment , 2008 .

[13]  A. Barnard,et al.  In-Water Instrumentation and Platforms forOcean Color Remote Sensing Applications , 2007 .

[14]  T. Dittmar,et al.  The biogeochemistry of the river and shelf ecosystem of the Arctic Ocean: a review , 2003 .

[15]  R. Holmes,et al.  A Field Course in the Siberian Arctic: 30 Days, 20 People, 3 Continents, 1 Barge , 2009 .

[16]  R. Striegl,et al.  Seasonal and spatial variability in dissolved organic matter quantity and composition from the Yukon River basin, Alaska , 2008 .

[17]  Paul V. Zimba,et al.  Remote Sensing Techniques to Assess Water Quality , 2003 .

[18]  M. Stieglitz,et al.  Lability of DOC transported by Alaskan rivers to the Arctic Ocean , 2008 .

[19]  T. Pavelsky,et al.  Intercomparison of four global precipitation data sets and their correlation with increased Eurasian river discharge to the Arctic Ocean , 2006 .

[20]  J. Taylor.  An Introduction to Error Analysis , 1982 .

[21]  R. Benner,et al.  Major flux of terrigenous dissolved organic matter through the Arctic Ocean , 1999 .

[22]  Richard B. Lammers,et al.  Increasing River Discharge to the Arctic Ocean , 2002, Science.

[23]  J. Neff,et al.  Snowmelt dominance of dissolved organic carbon in high‐latitude watersheds: Implications for characterization and flux of river DOC , 2006 .

[24]  Acia.  Arctic Climate Impact Assessment - ACIA , 2005 .

[25]  M. Bauer,et al.  A 20-year Landsat water clarity census of Minnesota's 10,000 lakes , 2008 .

[26]  F. Chapin,et al.  Permafrost and the Global Carbon Budget , 2006, Science.

[27]  Sébastien Roy,et al.  Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic , 2008 .

[28]  L. Anderson,et al.  Out‐gassing of CO2 from Siberian Shelf seas by terrestrial organic matter decomposition , 2009 .

[29]  P. Raymond,et al.  Seasonal and Annual Fluxes of Nutrients and Organic Matter from Large Rivers to the Arctic Ocean and Surrounding Seas , 2012, Estuaries and Coasts.

[30]  George R. Aiken,et al.  Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers , 2007 .

[31]  Mark D. Semon,et al.  POSTUSE REVIEW: An Introduction to Error Analysis: The Study of Uncertainties in Physical Measurements , 1982 .

[32]  Paula G Coble,et al.  Marine optical biogeochemistry: the chemistry of ocean color. , 2007, Chemical reviews.

[33]  E. Schuur,et al.  Seasonal changes in the age and structure of dissolved organic carbon in Siberian rivers and streams , 2006 .

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

[35]  F. S. Chapin,et al.  Permafrost carbon: Stock and decomposability of a globally significant carbon pool , 2006 .

[36]  Jouni Pulliainen,et al.  Landsat ETM+ Images in the Estimation of Seasonal Lake Water Quality in Boreal River Basins , 2008, Environmental management.

[37]  J. Neff,et al.  Dissolved Organic Carbon in Alaskan Boreal Forest: Sources, Chemical Characteristics, and Biodegradability , 2007, Ecosystems.

[38]  C. Stedmon,et al.  The supply and characteristics of colored dissolved organic matter (CDOM) in the Arctic Ocean: Pan Arctic trends and differences , 2011 .

[39]  R. Striegl,et al.  Utilizing chromophoric dissolved organic matter measurements to derive export and reactivity of dissolved organic carbon exported to the Arctic Ocean: A case study of the Yukon River, Alaska , 2009 .

[40]  T. Pavelsky,et al.  Remote sensing of suspended sediment concentration, flow velocity, and lake recharge in the Peace‐Athabasca Delta, Canada , 2009 .

[41]  Dennis A. Hansell,et al.  Linkages among Runoff, Dissolved Organic Carbon, and the Stable Oxygen Isotope Composition of Seawater and Other Water Mass Indicators in the Arctic Ocean , 2005 .

[42]  Andrew Kliskey,et al.  The Arctic freshwater system: Changes and impacts , 2007 .

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

[44]  L. Smith,et al.  Impacts of climate warming and permafrost thaw on the riverine transport of nitrogen and phosphorus to the Kara Sea , 2007 .

[45]  P. Chavez.  Image-Based Atmospheric Corrections - Revisited and Improved , 1996 .

[46]  S. Hagemann,et al.  Vulnerability of Permafrost Carbon to Climate Change: Implications for the Global Carbon Cycle , 2008 .

[47]  M. Bauer,et al.  Landsat-based Remote Sensing of Lake Water Quality Characteristics, Including Chlorophyll and Colored Dissolved Organic Matter (CDOM) , 2005 .

[48]  W. Vincent,et al.  Optical gradients and phytoplankton production in the Mackenzie River and the coastal Beaufort Sea , 2008, Polar Biology.

[49]  A. Townsend‐Small,et al.  Modeling transport and fate of riverine dissolved organic carbon in the Arctic Ocean , 2009 .

[50]  W M Davis,et al.  A GRADUATE SCHOOL OF GEOGRAPHY. , 2010, Science.

[51]  Karen E. Frey,et al.  Impacts of permafrost degradation on arctic river biogeochemistry , 2009 .

[52]  L. D. Hinzman,et al.  Disappearing Arctic Lakes , 2005, Science.

[53]  Darrel L. Williams,et al.  Landsat sensor performance: history and current status , 2004, IEEE Transactions on Geoscience and Remote Sensing.

[54]  E. R. Cohen.  An Introduction to Error Analysis: The Study of Uncertainties in Physical Measurements , 1998 .

[55]  J. Canadell,et al.  Soil organic carbon pools in the northern circumpolar permafrost region , 2009 .

[56]  Physikalisch-Chemisches Praktikum,et al.  Introduction to Error Analysis , 2009 .