Yan Liu

ORCID: 0000-0002-9775-1913
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About
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Research Areas
  • Cryospheric studies and observations
  • Climate change and permafrost
  • Winter Sports Injuries and Performance
  • Arctic and Antarctic ice dynamics
  • Ionosphere and magnetosphere dynamics
  • Landslides and related hazards
  • Remote Sensing in Agriculture
  • GNSS positioning and interference
  • Climate variability and models
  • Geophysics and Gravity Measurements
  • Meteorological Phenomena and Simulations
  • Hydrology and Watershed Management Studies
  • Soil Moisture and Remote Sensing
  • Fire effects on ecosystems
  • Atmospheric and Environmental Gas Dynamics
  • Environmental and Agricultural Sciences
  • Atmospheric chemistry and aerosols
  • Air Quality Monitoring and Forecasting
  • Land Use and Ecosystem Services
  • Lightning and Electromagnetic Phenomena
  • Tropical and Extratropical Cyclones Research
  • Urban Heat Island Mitigation
  • Geophysical Methods and Applications
  • Environmental Changes in China
  • Remote Sensing and Land Use

China Meteorological Administration
2006-2024

Shanghai University of Engineering Science
2024

Second Hospital of Hebei Medical University
2024

Hebei Medical University
2024

Beijing Normal University
2012-2023

Institute of Geographic Sciences and Natural Resources Research
2015-2021

Chinese Academy of Sciences
2015-2021

University of Chinese Academy of Sciences
2018-2021

Southern California University for Professional Studies
2021

University of Southern California
2021

Abstract Blue-ice areas (BIAs) and their geographical distribution in Antarctica were mapped using Landsat-7 ETM+ images with 15 m spatial resolution obtained during the 1999–2003 austral summers covering area north of 82.5° S, a snow grain-size image MODIS-based Mosaic (MOA) dataset 125 grid spacing acquired 2003/04 summer from 82.5°S to South Pole. A map BIAs was created algorithms thresholds based on band ratio reflectance for data grain size MOA dataset. The underlying principle is that...

10.3189/2014aog66a069 article EN Annals of Glaciology 2014-01-01

Abstract Due to limitations in transport and communication infrastructures difficulties accessing glaciers, it is challenging monitor snow glaciers. In this study, the enhanced Utah Energy Balance (UEB) with a glacier melt model above below forest ablation algorithm used assess contributions of melting three typical inland river basins (MRB, URB KRB) middle Tianshan Mountains China from 2002 2014. Forced by spatial downscaling meteorological forcing dataset (CMFD) coupled other parameters,...

10.1002/hyp.13760 article EN Hydrological Processes 2020-04-08

ABSTRACT Antarctica's response to climate change varies greatly both spatially and temporally. Surface melting impacts mass balance also lowers surface albedo. We use a 43-year record (from 1978 2020) of Antarctic snow melt seasons from space-borne microwave radiometers with machine-learning algorithm show that the onset end season are being delayed. Granger-causality analysis shows is delayed due increased heat flux ocean atmosphere at minimum sea-ice extent warming oceans. Melt...

10.1093/nsr/nwad157 article EN cc-by National Science Review 2023-05-27

Objective: To examine the risk factors linked with occupational blood exposure (OBE) among nursing staff (NS), we pinpoint deficiencies in compliance policies of infection prevention and control, assess expenditures associated control.Methods: Healthcare workers that completed an "Occupational Blood Exposure Report Form" were divided into NS (observation) group non-NS (control) group.Univariate multivariable analyses conducted to compare both groups various aspects.We also explored design...

10.2147/idr.s451615 article EN cc-by-nc Infection and Drug Resistance 2024-03-01

In comparison with the number of studies into impact on precipitation in China tropical cyclones (TCs) over western North Pacific, investigation effect TCs Bay Bengal (BoB) is lacking. this study, associated BoB was divided direct rainfall induced by TC cloud clusters and indirect related to long-distance transport water vapor. We partitioned TC-related that occurred during 2000–2018 analyzed its statistical features. It found 40 67 (60%) exerted influence China. Direct mainly distributed...

10.1007/s13351-023-2137-3 article EN Journal of Meteorological Research 2023-06-01

Abstract Mapping flood risk zone is an essential task in the arid region for sustainable water resources management. Due to lack of hydrological and meteorological information disaster event inventory Xinjiang, China, storm (SFD) zoning effective technique investigating potential impact SFD. In this study, statistics about natural, social, related SFD are collated. With help compiled data, a assessment model proposed Xinjiang based on random forest (RF) algorithm. Randomly selected negative...

10.1111/jfr3.12671 article EN cc-by Journal of Flood Risk Management 2020-11-12

The dissemination of fake news intended to deceive people, influence public opinion and manipulate social outcomes, has become a pressing problem on media. Moreover, information sharing media facilitates diffusion viral cascades. In this work, we focus understanding leveraging dynamics false legitimate contents in order facilitate network interventions for mitigation. We analyze real-world Twitter datasets comprising true cascades, understand differences user behaviours with regards...

10.1609/icwsm.v15i1.18093 article EN Proceedings of the International AAAI Conference on Web and Social Media 2021-05-22

Fengyun-3C (FY-3C) is the first Chinese satellite that capable of using Radio Occultation (RO) technique to retrieve atmospheric profiles. This research evaluates quality FY-3C RO profiles including refractivity, temperature, and specific humidity by comparing with corresponding information from European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Reanalysis (ERA-Interim) data over period 2015–2018. The evaluation carried out calculating analyzing mean systematic differences...

10.3390/rs12132116 article EN cc-by Remote Sensing 2020-07-01

This paper presents the design of an observation operator for assimilation global navigation satellite system (GNSS) radio occultation (RO) refractivity and related operational implementation strategy in GRAPES variational data system. A preliminary assessment RO effect is performed. The results show that are one most important types GRAPES, as they have a significant positive impact on analysis forecast at all ranges, especially Southern Hemisphere stratosphere where in-situ measurements...

10.1007/s13351-014-4028-0 article EN Journal of Meteorological Research 2014-12-01

Based on limited controlled experiments, both advanced and delayed shifts in flowering phenology induced by precipitation snow cover have been reported the Qinghai–Tibetan Plateau (QTP). To clarify impact of phenology, we conducted a comprehensive statistical analysis temporal change its responses to changes using regression models built largest collection ground phenological observation data QTP. We found that first date (FFD) for early-flowering time series significantly at rate −0.371 ±...

10.3390/su13147640 article EN Sustainability 2021-07-08

Land surface albedo plays an important role in the radiation budget and global climate models. NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) provide 16-day product with 500-m resolution every 8 days (MCD43A3). Some in-situ measurements were used as true values to validate MCD43A3 product. As MODIS retrievals do not include snow observations when there is ephemeral on ground a period, comparisons between 16 day averages of field data agree well. Another reason that cannot...

10.1002/hyp.9570 article EN Hydrological Processes 2012-10-04

Abstract. In this paper, we present a comprehensive experiment, namely, an Integrated Microwave Radiometry Campaign for snow (IMCS), in Xinjiang, China, during the season of 2015–2016. The campaign hosted dual-polarized microwave radiometer operating at L, K, and Ka bands to provide minutely passive observations cover fixed site, along with daily manual pit physical parameters, automatic 10 min four-component radiation layered temperatures, meteorological hourly weather data soil data. To...

10.5194/essd-14-3509-2022 article EN cc-by Earth system science data 2022-08-03

High spatial resolution snow depth (SD) is crucial for hydrological, ecological, and disaster research. However, passive microwave SD product (10/25 km) increasingly insufficient to meet contemporary requirements due its coarse resolution, particularly in heterogeneous alpine areas. In this study, we develop a superior downscaling algorithm based on the FT-Transformer (Feature Tokenizer + Transformer) model, termed FTSD. This fuses latest calibrated enhanced brightness temperature (CETB)...

10.3390/rs16244756 article EN cc-by Remote Sensing 2024-12-20
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