Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains
observations of temperatures Siberia has shown a several degree warming over the past 30 years. It is expected that forest will respond to warming at high latitudes through increased tree growth and northward or upward slope migration. migration. Tree response to climate trends is most likely observ...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20080039562 2023-05-15T18:39:56+02:00 Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains Ranson, K. Jon Kharuk, Viatcheslav I. Im, Sergey T. Unclassified, Unlimited, Publicly available [2007] application/pdf http://hdl.handle.net/2060/20080039562 unknown Document ID: 20080039562 http://hdl.handle.net/2060/20080039562 Copyright, Distribution as joint owner in the copyright CASI Earth Resources and Remote Sensing To be submitted to Remote Sensing of Environment 2007 ftnasantrs 2019-07-21T06:40:58Z observations of temperatures Siberia has shown a several degree warming over the past 30 years. It is expected that forest will respond to warming at high latitudes through increased tree growth and northward or upward slope migration. migration. Tree response to climate trends is most likely observable in the forest-tundra ecotone, where temperature mainly limits tree growth. Making repeated satellite observations over several decades provides an opportunity to track vegetation response to climate change. Based on Landsat data of the Sayan Mountains, Siberia, there was an increase in forest stand crown closure and an upward tree-line shift in the of the forest-tundra ecotone during the last quarter of the 2oth century,. On-ground observations, supporting these results, also showed regeneration of Siberian pine in the alpine tundra, and the transformation of prostrate Siberian pine and fir into arboreal (upright) forms. During this time period sparse stands transformed into closed stands, with existing closed stands increasing in area at a rate of approx. 1 %/yr, and advancing their upper border at a vertical rate of approx. 1.0 m/yr. In addition, the vertical rate of regeneration propagation is approx. 5 m/yr. It was also found that these changes correlated positively with temperature trends Other/Unknown Material Tundra Siberia NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Ranson, K. Jon Kharuk, Viatcheslav I. Im, Sergey T. Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
topic_facet |
Earth Resources and Remote Sensing |
description |
observations of temperatures Siberia has shown a several degree warming over the past 30 years. It is expected that forest will respond to warming at high latitudes through increased tree growth and northward or upward slope migration. migration. Tree response to climate trends is most likely observable in the forest-tundra ecotone, where temperature mainly limits tree growth. Making repeated satellite observations over several decades provides an opportunity to track vegetation response to climate change. Based on Landsat data of the Sayan Mountains, Siberia, there was an increase in forest stand crown closure and an upward tree-line shift in the of the forest-tundra ecotone during the last quarter of the 2oth century,. On-ground observations, supporting these results, also showed regeneration of Siberian pine in the alpine tundra, and the transformation of prostrate Siberian pine and fir into arboreal (upright) forms. During this time period sparse stands transformed into closed stands, with existing closed stands increasing in area at a rate of approx. 1 %/yr, and advancing their upper border at a vertical rate of approx. 1.0 m/yr. In addition, the vertical rate of regeneration propagation is approx. 5 m/yr. It was also found that these changes correlated positively with temperature trends |
format |
Other/Unknown Material |
author |
Ranson, K. Jon Kharuk, Viatcheslav I. Im, Sergey T. |
author_facet |
Ranson, K. Jon Kharuk, Viatcheslav I. Im, Sergey T. |
author_sort |
Ranson, K. Jon |
title |
Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
title_short |
Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
title_full |
Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
title_fullStr |
Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
title_full_unstemmed |
Landsat-based Analysis of Mountain Forest-tundra Ecotone Response to Climate Trends in Sayan Mountains |
title_sort |
landsat-based analysis of mountain forest-tundra ecotone response to climate trends in sayan mountains |
publishDate |
2007 |
url |
http://hdl.handle.net/2060/20080039562 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Tundra Siberia |
genre_facet |
Tundra Siberia |
op_source |
CASI |
op_relation |
Document ID: 20080039562 http://hdl.handle.net/2060/20080039562 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766228982624157696 |