Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data
As high-latitudes warm, permafrost thaws, and the hydrological cycle accelerates, ground-based monitoring of riverine organic matter may be supplemented by satellite remote sensing during ice-free conditions. Recent programs, namely the Arctic Great Rivers Observatory, have established methodologica...
Published in: | Remote Sensing of Environment |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | unknown |
Published: |
Clark Digital Commons
2018
|
Subjects: | |
Online Access: | https://commons.clarku.edu/faculty_geography/200 https://doi.org/10.1016/j.rse.2018.02.060 |
id |
ftclarkuniv:oai:commons.clarku.edu:faculty_geography-1199 |
---|---|
record_format |
openpolar |
spelling |
ftclarkuniv:oai:commons.clarku.edu:faculty_geography-1199 2023-09-05T13:16:55+02:00 Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data Griffin, C. G. McClelland, J. W. Frey, K. E. Fiske, G. Holmes, R. M. 2018-05-01T07:00:00Z https://commons.clarku.edu/faculty_geography/200 https://doi.org/10.1016/j.rse.2018.02.060 unknown Clark Digital Commons https://commons.clarku.edu/faculty_geography/200 doi:10.1016/j.rse.2018.02.060 https://doi.org/10.1016/j.rse.2018.02.060 Geography Arctic chromophoric dissolved organic matter dissolved organic carbon Google Earth Engine Landsat remote sensing rivers Hydrology text 2018 ftclarkuniv https://doi.org/10.1016/j.rse.2018.02.060 2023-08-14T06:15:24Z As high-latitudes warm, permafrost thaws, and the hydrological cycle accelerates, ground-based monitoring of riverine organic matter may be supplemented by satellite remote sensing during ice-free conditions. Recent programs, namely the Arctic Great Rivers Observatory, have established methodologically consistent sampling across the hydrograph, and shared the resulting data publicly. However, these efforts are limited by frequency, funding, and length of record. Satellite remote sensing can be used to estimate chromophoric dissolved organic matter (CDOM) as a riverine constituent that influences optical properties in surface waters. In this study, daily CDOM absorption was first estimated using discharge-constituent regression-based models for 2000–2013. We then regressed these discharge-based CDOM estimates against Landsat TM and ETM+ surface reflectance data from Google Earth Engine for the six largest rivers draining the pan-Arctic watershed (the Kolyma, Lena, Mackenzie, Ob’ Yenisey, and Yukon rivers). These CDOM results were converted to dissolved organic carbon (DOC), using the strong relationship (R2 = 0.88) between direct measurements of the two constituents. Using river-specific remote sensing models, R2 could be as high as 0.84. Grouping all rivers into a single “universal” regression reduced R2 and increased root mean square errors, such as in the Yenisey River where R2 dropped by 0.63, and RMSE rose by 1.1 m−1. Seasonally varying discharge drove much of the variation in satellite-derived CDOM and DOC, corroborating recent studies. Satellite imagery can increase the frequency of monitoring observations, particularly during summer and fall when riverine CDOM absorption may be most sensitive to thawing permafrost. Text Arctic Ice permafrost yenisey river Yukon Clark University: Clark Digital Commons Arctic Yukon Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Yenisey ENVELOPE(82.680,82.680,71.828,71.828) Remote Sensing of Environment 209 395 409 |
institution |
Open Polar |
collection |
Clark University: Clark Digital Commons |
op_collection_id |
ftclarkuniv |
language |
unknown |
topic |
Arctic chromophoric dissolved organic matter dissolved organic carbon Google Earth Engine Landsat remote sensing rivers Hydrology |
spellingShingle |
Arctic chromophoric dissolved organic matter dissolved organic carbon Google Earth Engine Landsat remote sensing rivers Hydrology Griffin, C. G. McClelland, J. W. Frey, K. E. Fiske, G. Holmes, R. M. Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
topic_facet |
Arctic chromophoric dissolved organic matter dissolved organic carbon Google Earth Engine Landsat remote sensing rivers Hydrology |
description |
As high-latitudes warm, permafrost thaws, and the hydrological cycle accelerates, ground-based monitoring of riverine organic matter may be supplemented by satellite remote sensing during ice-free conditions. Recent programs, namely the Arctic Great Rivers Observatory, have established methodologically consistent sampling across the hydrograph, and shared the resulting data publicly. However, these efforts are limited by frequency, funding, and length of record. Satellite remote sensing can be used to estimate chromophoric dissolved organic matter (CDOM) as a riverine constituent that influences optical properties in surface waters. In this study, daily CDOM absorption was first estimated using discharge-constituent regression-based models for 2000–2013. We then regressed these discharge-based CDOM estimates against Landsat TM and ETM+ surface reflectance data from Google Earth Engine for the six largest rivers draining the pan-Arctic watershed (the Kolyma, Lena, Mackenzie, Ob’ Yenisey, and Yukon rivers). These CDOM results were converted to dissolved organic carbon (DOC), using the strong relationship (R2 = 0.88) between direct measurements of the two constituents. Using river-specific remote sensing models, R2 could be as high as 0.84. Grouping all rivers into a single “universal” regression reduced R2 and increased root mean square errors, such as in the Yenisey River where R2 dropped by 0.63, and RMSE rose by 1.1 m−1. Seasonally varying discharge drove much of the variation in satellite-derived CDOM and DOC, corroborating recent studies. Satellite imagery can increase the frequency of monitoring observations, particularly during summer and fall when riverine CDOM absorption may be most sensitive to thawing permafrost. |
format |
Text |
author |
Griffin, C. G. McClelland, J. W. Frey, K. E. Fiske, G. Holmes, R. M. |
author_facet |
Griffin, C. G. McClelland, J. W. Frey, K. E. Fiske, G. Holmes, R. M. |
author_sort |
Griffin, C. G. |
title |
Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
title_short |
Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
title_full |
Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
title_fullStr |
Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
title_full_unstemmed |
Quantifying CDOM and DOC in major Arctic rivers during ice-free conditions using Landsat TM and ETM+ data |
title_sort |
quantifying cdom and doc in major arctic rivers during ice-free conditions using landsat tm and etm+ data |
publisher |
Clark Digital Commons |
publishDate |
2018 |
url |
https://commons.clarku.edu/faculty_geography/200 https://doi.org/10.1016/j.rse.2018.02.060 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) ENVELOPE(82.680,82.680,71.828,71.828) |
geographic |
Arctic Yukon Kolyma Yenisey |
geographic_facet |
Arctic Yukon Kolyma Yenisey |
genre |
Arctic Ice permafrost yenisey river Yukon |
genre_facet |
Arctic Ice permafrost yenisey river Yukon |
op_source |
Geography |
op_relation |
https://commons.clarku.edu/faculty_geography/200 doi:10.1016/j.rse.2018.02.060 https://doi.org/10.1016/j.rse.2018.02.060 |
op_doi |
https://doi.org/10.1016/j.rse.2018.02.060 |
container_title |
Remote Sensing of Environment |
container_volume |
209 |
container_start_page |
395 |
op_container_end_page |
409 |
_version_ |
1776198324883292160 |