The role of land cover change in Arctic-Boreal greening and browning trends
Abstract Many studies have used time series of satellite-derived vegetation indices to identify so-called greening and browning trends across the northern high-latitudes and to suggest that the productivity of Arctic-Boreal ecosystems is changing in response to climate forcing at local and continent...
Published in: | Environmental Research Letters |
---|---|
Main Authors: | , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
IOP Publishing
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429/pdf |
id |
crioppubl:10.1088/1748-9326/ab5429 |
---|---|
record_format |
openpolar |
spelling |
crioppubl:10.1088/1748-9326/ab5429 2024-10-13T14:04:45+00:00 The role of land cover change in Arctic-Boreal greening and browning trends Wang, Jonathan A Friedl, Mark A National Aeronautics and Space Administration National Science Foundation 2019 http://dx.doi.org/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 14, issue 12, page 125007 ISSN 1748-9326 journal-article 2019 crioppubl https://doi.org/10.1088/1748-9326/ab5429 2024-09-23T04:17:11Z Abstract Many studies have used time series of satellite-derived vegetation indices to identify so-called greening and browning trends across the northern high-latitudes and to suggest that the productivity of Arctic-Boreal ecosystems is changing in response to climate forcing at local and continental scales. However, disturbances that alter land cover are prevalent in Arctic-Boreal ecosystems, and changes in Arctic-Boreal land cover, which complicate interpretation of trends in vegetation indices, have mostly been ignored in previous studies. Here we use a new land cover change dataset derived from Landsat imagery to explore the extent to which land cover and land cover change influence trends in the normalized difference vegetation index (NDVI) over a large (3.76 M km 2 ) area of NASA’s Arctic Boreal Vulnerability Experiment, which spans much of northwestern Canada and Alaska. Between 1984 and 2012, 21.2% of the study domain experienced land cover change and 42.7% had significant NDVI trends. Land cover change occurred in 27.6% of locations with significant NDVI trends during this period and resulted in greening and browning rates 48%–128% higher than in areas of stable land cover. While the majority of land cover change areas experienced significant NDVI trends, more than half of areas with stable land cover did not. Further, the extent and magnitude of browning and greening trends varied substantially as a function of land cover class and land cover change type. Forest disturbance from fire and timber harvest drove over one third of statistically significant NDVI trends and created complex mosaics of recent forest loss (as browning) and post-disturbance recovery (as greening) at both landscape and continental scale. Our results demonstrate the importance of land cover changes in highly disturbed high-latitude ecosystems for interpreting trends of NDVI and productivity across multiple spatial scales. Article in Journal/Newspaper Arctic Alaska IOP Publishing Arctic Browning ENVELOPE(164.050,164.050,-74.617,-74.617) Canada Environmental Research Letters 14 12 125007 |
institution |
Open Polar |
collection |
IOP Publishing |
op_collection_id |
crioppubl |
language |
unknown |
description |
Abstract Many studies have used time series of satellite-derived vegetation indices to identify so-called greening and browning trends across the northern high-latitudes and to suggest that the productivity of Arctic-Boreal ecosystems is changing in response to climate forcing at local and continental scales. However, disturbances that alter land cover are prevalent in Arctic-Boreal ecosystems, and changes in Arctic-Boreal land cover, which complicate interpretation of trends in vegetation indices, have mostly been ignored in previous studies. Here we use a new land cover change dataset derived from Landsat imagery to explore the extent to which land cover and land cover change influence trends in the normalized difference vegetation index (NDVI) over a large (3.76 M km 2 ) area of NASA’s Arctic Boreal Vulnerability Experiment, which spans much of northwestern Canada and Alaska. Between 1984 and 2012, 21.2% of the study domain experienced land cover change and 42.7% had significant NDVI trends. Land cover change occurred in 27.6% of locations with significant NDVI trends during this period and resulted in greening and browning rates 48%–128% higher than in areas of stable land cover. While the majority of land cover change areas experienced significant NDVI trends, more than half of areas with stable land cover did not. Further, the extent and magnitude of browning and greening trends varied substantially as a function of land cover class and land cover change type. Forest disturbance from fire and timber harvest drove over one third of statistically significant NDVI trends and created complex mosaics of recent forest loss (as browning) and post-disturbance recovery (as greening) at both landscape and continental scale. Our results demonstrate the importance of land cover changes in highly disturbed high-latitude ecosystems for interpreting trends of NDVI and productivity across multiple spatial scales. |
author2 |
National Aeronautics and Space Administration National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Wang, Jonathan A Friedl, Mark A |
spellingShingle |
Wang, Jonathan A Friedl, Mark A The role of land cover change in Arctic-Boreal greening and browning trends |
author_facet |
Wang, Jonathan A Friedl, Mark A |
author_sort |
Wang, Jonathan A |
title |
The role of land cover change in Arctic-Boreal greening and browning trends |
title_short |
The role of land cover change in Arctic-Boreal greening and browning trends |
title_full |
The role of land cover change in Arctic-Boreal greening and browning trends |
title_fullStr |
The role of land cover change in Arctic-Boreal greening and browning trends |
title_full_unstemmed |
The role of land cover change in Arctic-Boreal greening and browning trends |
title_sort |
role of land cover change in arctic-boreal greening and browning trends |
publisher |
IOP Publishing |
publishDate |
2019 |
url |
http://dx.doi.org/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429 https://iopscience.iop.org/article/10.1088/1748-9326/ab5429/pdf |
long_lat |
ENVELOPE(164.050,164.050,-74.617,-74.617) |
geographic |
Arctic Browning Canada |
geographic_facet |
Arctic Browning Canada |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
Environmental Research Letters volume 14, issue 12, page 125007 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ab5429 |
container_title |
Environmental Research Letters |
container_volume |
14 |
container_issue |
12 |
container_start_page |
125007 |
_version_ |
1812810311754842112 |