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Assessing changes in mangrove forest cover and carbon stocks in the Lower Mekong Region using Google Earth Engine

Authors :
Megha Bajaj
Nophea Sasaki
Takuji W. Tsusaka
Manjunatha Venkatappa
Issei Abe
Rajendra P. Shrestha
Source :
Innovation and Green Development, Vol 3, Iss 3, Pp 100140- (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

The Lower Mekong Region (LMR) faces significant loss of mangrove forests, yet limited studies have explored this decline in the region. Here, we employ Google Earth Engine and Landsat satellite imagery to assess changes in mangrove forest cover across Myanmar, Thailand, Vietnam, and Cambodia between 1989 and 2020, with a five-year interval. Accordingly, we estimated carbon stock changes due to changes of forest cover. Our analysis yielded an overall average accuracy of 92.10% and an average kappa coefficient of 0.89 across the four countries. The findings reveal a 0.9% increase in mangrove area in Myanmar, 2.5% in Thailand, and 1.3% in Cambodia, while Vietnam experienced a 0.2% loss annually between 1989 and 2020. Carbon stocks in mangrove forests were estimated at 577.0 ​Tg of carbon or TgC, 250.0 TgC, 61.6 TgC, and 269.0 TgC in 1989 for Myanmar, Thailand, Cambodia, and Vietnam respectively, and increased to 736.0 TgC, 443.0 TgC, 86.7 TgC, and 254 TgC in 2020. Increase in mangrove areas resulted in carbon removals of 42.8 TgCO2 year−1 over the same period above. Depending on policies in these respective countries, such carbon removals could be used to claim for result-based payment under the REDD ​+ ​scheme of the United Nations Framework Convention on Climate Change.

Details

Language :
English
ISSN :
29497531
Volume :
3
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Innovation and Green Development
Publication Type :
Academic Journal
Accession number :
edsdoj.b402dfcb84be47d092ff08a084721c62
Document Type :
article
Full Text :
https://doi.org/10.1016/j.igd.2024.100140