The spatio-temporal variation of precipitation under global warming had been a research hotspot. Snowfall is an important part precipitation, and its variabilities trends in different regions have received great attention. In this paper, the Haihe River Basin used as case, we employ K-means clustering method to divide basin into four sub-regions. double temperature threshold form exponential eq...

An observation-based study is presented that utilizes aircraft data from the 2003 Wakasa Bay AMSR Precipitation Validation Campaign to assess recent advances in the modeling of microwave scattering properties of realistic ice particles in the atmosphere. Previous work has suggested that a triple-frequency reflectivity framework appears to have utility for identifying key microphysical propertie...

Moisture sources for snow falling in Dronning Maud Land (DML), Antarctica, are calculated for 1998 using three dimensional 5-days backward air parcel trajectories. The drilling site of the European Project onIce CoringinAntarctica(EP1CA) inDMLischosenasthemainarrivalpoint (75.0°S, 0.01"E). Adistinction is made between trajectories with and without snowfall at arrival. Of the snowfall trajectori...

The Tanana River flows through interior Alaska, a region characterized by discontinuous permafrost. Studies link degrading permafrost to increased winter river discharge due to greater groundwater (GW) recharge increasing GW input to river baseflow. In winter, interior Alaskan rivers are exclusively fed by GW, which provides an external source of heat. In fact, some portions of rivers fed by GW...

The Arctic sea ice retreat has accelerated over the last decade. The negative trend is largest in summer, but substantial interannual variability still remains. Here we explore observed atmospheric conditions and feedback mechanisms during summer months of anomalous sea ice melt in the Arctic. Compositing months of anomalous low and high sea ice melt over 1979–2013, we find distinct patterns in...

BACKGROUND This study analyzes Chicago-area weather effects on objectively measured physical activity over a 3-year period among a cohort of 241 participants in an on-going arthritis physical activity trial. METHODS Uniaxial accelerometer counts and interview data were analyzed for up to 6 weekly study waves involving 4823 days of wear. The effects of temperature, rainfall, snowfall and dayli...

[1] We model the atmospheric response to a chaos‐forming event at Juventae Chasma, north of Valles Marineris, Mars, using the Mars Regional Atmospheric Modeling System (MRAMS). Interactions between lake‐driven convergence, topography, and the regional wind field steer lake‐induced precipitation to the southwest. Mean snowfall reaches a maximum of 0.9 mm/h water equivalent (peak snowfall 1.7 mm/...

Accumulation gain is essential for mass balance of valley glaciers in the Karakoram Himalayas. The higher elevation of this area received snowfall(>1000 cm · yr−1) annually, while the snowfall occupies 95% of total precipitation (75-150 cm · yr−1). Meanwhile, the air temperature ranging from -20 to -40 °C, during DecemberFebruary, is also very suitable for accumulation of glacier mass. We choos...

High-resolution Weather Research and Forecasting Model (WRF) simulations are used to explore the sensitivity ofGreat Lakes lake-effect snowfall (LES) to changes in lake ice cover and surface temperature.A control simulation with observed ice cover is compared with three sensitivity tests: complete ice cover, no lake ice, and warmer lake surface temperatures. The spatial pattern of unfrozen lake...