Spatial and temporal patterns of vegetation- climate interactions
In this thesis, I tried to understand the patterns and processes of vegetation trends at different spatial scales and resolution. The spatial variability in vegetation trends was related to inter and intra-annual changes in climate, mainly, temperature and precipitation. In this thesis, I applied no...
Main Author: | |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://etd.iisc.ac.in/handle/2005/4456 |
id |
ftiiscdiss:oai:etd.iisc.ac.in:2005/4456 |
---|---|
record_format |
openpolar |
spelling |
ftiiscdiss:oai:etd.iisc.ac.in:2005/4456 2024-06-09T07:50:01+00:00 Spatial and temporal patterns of vegetation- climate interactions Murthy, Karthik Bagchi, Sumanta 2019 application/pdf https://etd.iisc.ac.in/handle/2005/4456 en_US eng https://etd.iisc.ac.in/handle/2005/4456 I grant Indian Institute of Science the right to archive and to make available my thesis or dissertation in whole or in part in all forms of media, now hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation eco-physiology phtosynthesis enzymes Theil-Sen slope Research Subject Categories::NATURAL SCIENCES::Biology::Organism biology::Plant physiology Thesis 2019 ftiiscdiss 2024-05-15T03:03:44Z In this thesis, I tried to understand the patterns and processes of vegetation trends at different spatial scales and resolution. The spatial variability in vegetation trends was related to inter and intra-annual changes in climate, mainly, temperature and precipitation. In this thesis, I applied non-parameteric linear regression (Sen’s slope) to calculate trends in vegetation and climatic variables. The relationship between long-term vegetation trends and climate shifted between seasons in Trans-Himalaya. Phenological response to climate change can determine the strength and direction of feedback between the biosphere and the earth’s climate system. I evaluated the influence of changes in temperature and precipitation on vegetation phenology in the Central Asian highlands. The Central Asian highlands consists of arid and tundra climatic regions. Arid regions experience higher evapo-transpirational stress compared to tundra regions. Therefore, vegetation response to changes in climate can differ between arid and tundra regions. The changes in phenology was calculated by analyzing the changes in shape of uni-modal curve, which represents the vegetation annual biomass. Long-term changes in peak, skewness and kurtosis of the uni-modal curve correspond to peak biomass, timing of the peak biomass and length of the vegetation period respectively. Overall, arid regions showed higher changes in plant phenology compared to tundra with higher increase in peak biomass, earlier peaking and shorter vegetation period. Arid regions experienced higher temperature rise, but tundra regions experienced increase in snow and rain. The vegetation-climate relationship was evaluated using multiple linear regression and Cannonical Correlation Analysis. Both these analysis showed that the temperature and precipitation had an opposite effect on vegetation phenology. Warming conditions were related to earlier peaking and shortening the length of the vegetation period; while increase in precipitation was related to delayed peaking and ... Thesis Tundra Indian Instiute of Science, Bangalore: etd@IIsc (Electronic Theses and Disserations) |
institution |
Open Polar |
collection |
Indian Instiute of Science, Bangalore: etd@IIsc (Electronic Theses and Disserations) |
op_collection_id |
ftiiscdiss |
language |
English |
topic |
eco-physiology phtosynthesis enzymes Theil-Sen slope Research Subject Categories::NATURAL SCIENCES::Biology::Organism biology::Plant physiology |
spellingShingle |
eco-physiology phtosynthesis enzymes Theil-Sen slope Research Subject Categories::NATURAL SCIENCES::Biology::Organism biology::Plant physiology Murthy, Karthik Spatial and temporal patterns of vegetation- climate interactions |
topic_facet |
eco-physiology phtosynthesis enzymes Theil-Sen slope Research Subject Categories::NATURAL SCIENCES::Biology::Organism biology::Plant physiology |
description |
In this thesis, I tried to understand the patterns and processes of vegetation trends at different spatial scales and resolution. The spatial variability in vegetation trends was related to inter and intra-annual changes in climate, mainly, temperature and precipitation. In this thesis, I applied non-parameteric linear regression (Sen’s slope) to calculate trends in vegetation and climatic variables. The relationship between long-term vegetation trends and climate shifted between seasons in Trans-Himalaya. Phenological response to climate change can determine the strength and direction of feedback between the biosphere and the earth’s climate system. I evaluated the influence of changes in temperature and precipitation on vegetation phenology in the Central Asian highlands. The Central Asian highlands consists of arid and tundra climatic regions. Arid regions experience higher evapo-transpirational stress compared to tundra regions. Therefore, vegetation response to changes in climate can differ between arid and tundra regions. The changes in phenology was calculated by analyzing the changes in shape of uni-modal curve, which represents the vegetation annual biomass. Long-term changes in peak, skewness and kurtosis of the uni-modal curve correspond to peak biomass, timing of the peak biomass and length of the vegetation period respectively. Overall, arid regions showed higher changes in plant phenology compared to tundra with higher increase in peak biomass, earlier peaking and shorter vegetation period. Arid regions experienced higher temperature rise, but tundra regions experienced increase in snow and rain. The vegetation-climate relationship was evaluated using multiple linear regression and Cannonical Correlation Analysis. Both these analysis showed that the temperature and precipitation had an opposite effect on vegetation phenology. Warming conditions were related to earlier peaking and shortening the length of the vegetation period; while increase in precipitation was related to delayed peaking and ... |
author2 |
Bagchi, Sumanta |
format |
Thesis |
author |
Murthy, Karthik |
author_facet |
Murthy, Karthik |
author_sort |
Murthy, Karthik |
title |
Spatial and temporal patterns of vegetation- climate interactions |
title_short |
Spatial and temporal patterns of vegetation- climate interactions |
title_full |
Spatial and temporal patterns of vegetation- climate interactions |
title_fullStr |
Spatial and temporal patterns of vegetation- climate interactions |
title_full_unstemmed |
Spatial and temporal patterns of vegetation- climate interactions |
title_sort |
spatial and temporal patterns of vegetation- climate interactions |
publishDate |
2019 |
url |
https://etd.iisc.ac.in/handle/2005/4456 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
https://etd.iisc.ac.in/handle/2005/4456 |
op_rights |
I grant Indian Institute of Science the right to archive and to make available my thesis or dissertation in whole or in part in all forms of media, now hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation |
_version_ |
1801382978437251072 |