Multiple trend tests on air temperature and precipitation anomalies in Vietnam

An informed decision on building climate resilience and adaptation requires a deep understanding of long-term changes in temperature and precipitation, especially for most vulnerable countries to climate extremes like Vietnam. Hence, this study aimed to comprehend spatiotemporal trend possibilities...

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Bibliographic Details
Published in:Journal of water and climate change 2022-03, Vol.13 (3), p.1340-1353
Main Authors: Phuong, Dang Nguyen Dong, Dat, Nguyen Le Tan, Loi, Nguyen Kim
Format: Article
Language:English
Subjects:
Air temperature
Anomalies
Case studies
Cities
Climate
Climate adaptation
Climate change
Climate change adaptation
Climatic extremes
Datasets
Floods
Long-term changes
long-term trends
multiple trend tests
Normal distribution
Precipitation
Precipitation anomalies
Precipitation-temperature relationships
Sensitivity analysis
spatiotemporal trend patterns
Statistical analysis
Temperature requirements
Tests
Trends
vietnam
Wind
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Summary:An informed decision on building climate resilience and adaptation requires a deep understanding of long-term changes in temperature and precipitation, especially for most vulnerable countries to climate extremes like Vietnam. Hence, this study aimed to comprehend spatiotemporal trend possibilities of temperature and precipitation in Vietnam by employing multiple non-parametric statistical trend tests. This study also suggested a modified procedure, represented as a Hovmöller-like diagram, for enhancing the characterization of long-term spatiotemporal trends by applying multiple monotonic trend tests to all latitude coordinates through all possible 30-year periods. The superiority of multiple trend tests over a single one is that this methodology can assess the sensitivity of trend test results to the beginning years, ending years, and record lengths, thus emphasizing the necessity of performing monotonic trend tests repeatedly. The results show consistent warming trends in all climate sub-regions over the last 4–5 decades, with the estimated trend slopes varying from approximately 0.010–0.042 °C/year. Precipitation anomalies in most climate sub-regions, especially in the southern part, experienced significant increasing trends at the rate of around 0.29–2.76%/year during the last 3–5 decades. These findings are expected to contribute more insights into the spatiotemporal trend patterns of temperature and precipitation in Vietnam.
ISSN:2040-2244
2408-9354
DOI:10.2166/wcc.2022.414