Climate and local environment co-mediate the taxonomic and functional diversity of bacteria and archaea in the Qinghai-Tibet Plateau rivers

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 168968 - 168968

Published: Dec. 1, 2023

Language: Английский

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Monitoring the extreme flood events in the Yangtze River basin based on GRACE and GRACE-FO satellite data

Hydrology and earth system sciences, Journal Year: 2022, Volume and Issue: 26(22), P. 5933 - 5954

Published: Nov. 25, 2022

Abstract. Gravity Recovery and Climate Experiment (GRACE) its successor GRACE Follow-on (GRACE-FO) satellite provide terrestrial water storage anomaly (TWSA) estimates globally that can be used to monitor flood in various regions at monthly intervals. However, the coarse temporal resolution of GRACE-FO data has been limiting their applications finer scales. In this study, TWSA have reconstructed then temporally downscaled into daily values based on three different learning-based models, namely a multi-layer perceptron (MLP) model, long-short term memory (LSTM) model multiple linear regression (MLR) model. Furthermore, new index incorporating combined with average precipitation anomalies is proposed severe events sub-monthly timescales for Yangtze River basin (YRB), China. The results indicated (1) MLP shows best performance reconstructing root mean square error (RMSE) = 10.9 mm per month Nash–Sutcliffe efficiency (NSE) 0.89 during validation period; (2) useful downscaling values; (3) normalized potential (NDFPI) facilitates robust reliable characterization timescales; (4) monitored by NDFPI earlier than traditional streamflow observations respect YRB individual subbasins. All these findings opportunities applying investigations signals important implications hazard prevention mitigation study region.

Language: Английский

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Ice thickness and water level estimation for ice-covered lakes with satellite altimetry waveforms and backscattering coefficients

˜The œcryosphere, Journal Year: 2023, Volume and Issue: 17(1), P. 349 - 369

Published: Jan. 24, 2023

Abstract. Lake ice, serving as a sensitive indicator of climate change, is an important regulator regional hydroclimate and lake ecosystems. For ice-covered lakes, traditional satellite altimetry-based water level estimation often subject to winter anomalies that are closely related the thickening ice. Despite recent efforts made exploit altimetry data resolve two interrelated variables, i.e., ice thickness (LIT) several issues remain unsolved, including inability estimate LIT with altimetric backscattering coefficients in ungauged lakes due dependence on situ data. It still unclear what role surface snow plays retrieval levels Here we developed novel method by combining waveforms without using To overcome complicated initial conditions better represent thick conditions, logarithmic regression model was transform into LIT. We investigated differential impact estimating for when different threshold retracking methods used. The method, validated against cross-validated modeled LIT, shows accuracy ∼ 0.2 m effective at detecting thin cannot be retrieved waveforms. also improved strategy merging derived from methods. This study facilitates interpretation signals provides opportunities wider application cryosphere.

Language: Английский

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Multi-source satellite reveals the heterogeneity in water storage change over northwestern China in recent decades

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 624, P. 129953 - 129953

Published: July 17, 2023

Language: Английский

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Strong coupling between soil moisture and temperature intensifies warming and humidification on the Tibetan Plateau: Evidence from 200-year tree ring records

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2024, Volume and Issue: 644, P. 112206 - 112206

Published: April 18, 2024

Language: Английский

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