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Title: Interdependent Dynamics of LAI-Albedo across the Roofing Landscapes: Mongolian and Tibetan Plateaus

Abstract

The Mongolian Plateau (MP) and Tibetan Plateau (TP) have experienced higher-than-global average warming in recent decades, resulting in many significant changes in ecosystem structure and function. Among them are the leaf area index (LAI) and albedo, which play a fundamental role in understanding many causes and consequences of land surface processes and climate. Here, we focused on the spatiotemporal changes of LAI, albedo, and their spatiotemporal relationships on the two roofing landscapes in Eurasia. Based on the MODIS products, we investigated the spatiotemporal changes of albedo( VIS, NIR and SHO) and LAI from 2000 through 2016. We found that there existed a general negative logarithmic relationship between LAI and three measures of albedo on both plateaus. No significant relationship was found for LAI-albedo NIR on the TP, due to more complex land surface canopy characteristics affected by the NIR reflection there. During 2000–2016, overall, annual mean LAI increased significantly by 119.40 × 10 3 km 2 on the MP and by 28.35 × 10 3 km 2 on the TP, while the decreased areas for annual mean albedoVIS were 585.59 × 10 3 km 2 and 235.73 × 10 3 km 2 on the MP and TP, respectively. More importantly,more » the LAI-albedo relationships varied substantially across the space and over time, with mismatches found in some parts of the landscapes. Substantial additional efforts with observational and/or experimental investigations are needed to explore the underlying mechanisms responsible for these relationships, including the influences of vegetation characteristics and disturbances.« less

Authors:
 [1]; ORCiD logo [2];  [3]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Qianyanzhou Ecological Research Station, Key Lab. of Ecosystem Network Observation and Modeling, Inst. of Geographic Sciences and Natural Resources Research
  2. Michigan State Univ., East Lansing, MI (United States). CGCEO and Dept. of Geography, Environment, and Spatial Sciences
  3. Chinese Academy of Sciences (CAS), Beijing (China). National Hulunber Grassland Ecosystem Observation and Research Station & Inst. of Agricultural Resources and Regional Planning
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1499906
Grant/Contract Number:  
FC02-07ER64494
Resource Type:
Accepted Manuscript
Journal Name:
Remote Sensing
Additional Journal Information:
Journal Volume: 10; Journal Issue: 7; Journal ID: ISSN 2072-4292
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; albedo; leaf area index (LAI); alpine; Eurasian continent; altitude and latitude; energy balance; global warming; land surface process

Citation Formats

Tian, Li, Chen, Jiquan, and Shao, Changliang. Interdependent Dynamics of LAI-Albedo across the Roofing Landscapes: Mongolian and Tibetan Plateaus. United States: N. p., 2018. Web. doi:10.3390/rs10071159.
Tian, Li, Chen, Jiquan, & Shao, Changliang. Interdependent Dynamics of LAI-Albedo across the Roofing Landscapes: Mongolian and Tibetan Plateaus. United States. doi:10.3390/rs10071159.
Tian, Li, Chen, Jiquan, and Shao, Changliang. Mon . "Interdependent Dynamics of LAI-Albedo across the Roofing Landscapes: Mongolian and Tibetan Plateaus". United States. doi:10.3390/rs10071159. https://www.osti.gov/servlets/purl/1499906.
@article{osti_1499906,
title = {Interdependent Dynamics of LAI-Albedo across the Roofing Landscapes: Mongolian and Tibetan Plateaus},
author = {Tian, Li and Chen, Jiquan and Shao, Changliang},
abstractNote = {The Mongolian Plateau (MP) and Tibetan Plateau (TP) have experienced higher-than-global average warming in recent decades, resulting in many significant changes in ecosystem structure and function. Among them are the leaf area index (LAI) and albedo, which play a fundamental role in understanding many causes and consequences of land surface processes and climate. Here, we focused on the spatiotemporal changes of LAI, albedo, and their spatiotemporal relationships on the two roofing landscapes in Eurasia. Based on the MODIS products, we investigated the spatiotemporal changes of albedo(VIS, NIR and SHO) and LAI from 2000 through 2016. We found that there existed a general negative logarithmic relationship between LAI and three measures of albedo on both plateaus. No significant relationship was found for LAI-albedoNIR on the TP, due to more complex land surface canopy characteristics affected by the NIR reflection there. During 2000–2016, overall, annual mean LAI increased significantly by 119.40 × 103 km2 on the MP and by 28.35 × 103 km2 on the TP, while the decreased areas for annual mean albedoVIS were 585.59 × 103 km2 and 235.73 × 103 km2 on the MP and TP, respectively. More importantly, the LAI-albedo relationships varied substantially across the space and over time, with mismatches found in some parts of the landscapes. Substantial additional efforts with observational and/or experimental investigations are needed to explore the underlying mechanisms responsible for these relationships, including the influences of vegetation characteristics and disturbances.},
doi = {10.3390/rs10071159},
journal = {Remote Sensing},
number = 7,
volume = 10,
place = {United States},
year = {2018},
month = {7}
}

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