Prabhakar Shrestha

about

Dhunge Dhara ('Hiti' in Newari) or Stone taps are omnipresent in Kathmandu Valley, most of which, used to have perennial water supply but only few are functional in the core of the valley due to rapid urbanization and anthropogenic disturbances of water channels, preferential groundwater flow paths including uncontrolled groundwater abstraction.

Infact, all Dhunge Dhara are fed by either Rajkulos (water channels from foothills) or local groundwater sources. Thus groundwater recharge of the hills and the valley itself is important for steady supply of water in these spouts, which mostly occurs during monsoon rainfall (June-July-August-September) every year after year. Besides synoptical scale oscilations, this distinct monsoon rainfall is heavily modulated by the local surrounding hills, and anthropogenic activity (e.g., changing land use and land cover, and the regional buildup of aerosol loading during the pre-monsoon and monsoon season).

With rapid urbanization and changing of fertile crop lands into urban areas, we are not only changing the day/night temperature and humidity, but also the surface runoff and groundwater flow. And, the emissions from urban areas are also changing the aerosol physical and chemical properties over the valley. Directly/indirectly via multiple feedback processes, we are perturbing the terrestrial water cycle.

research

My research focuses on quantitative prediction of the impact of land use, land cover changes and aerosol cloud interactions on terrestrial water cycle using earth system models.

Grants

NASA Earth Science System Fellowship (NESSF 2007 - 3 year funding)
Characterization of Aerosol-Cloud-Rainfall Interactions and Water Cycle Impacts in the Himalayas

BMBF Project (2014 ongoing)
High definition clouds and precipitation for advancing climate prediction
Coordination of S4
Detecting and Parameterizing Effects of Land Heterogeneity (WP6-S4)

DFG Project (2019 start)
Investigating the impact of Land-use and land-cover change on Aerosol-Cloud-precipitation interactions Using Polarimetric Radar retrievals ILACPR/PROM

Publications

Shrestha, P. (2019). TerrSysMP Pre-processing and Post-processing System. CRC/TR32 Database (TR32DB). CRC/TR32 Database (TR32DB). DOI: 10.5880/TR32DB.37.

Sulis M., V. Couvreur, J. Keune, G. Cai, I. Trebs, J. Junk, P. Shrestha, C. Simmer, S. J. Kollet, H. Vereecken, J. Vanderborght (2019). Incorporating a root water uptake model based on the hydraulic architecture approach in terrestrial systems simulations. Agricultural and Forest Meteorology, doi: 10.1016/j.agrformet.2019.01.034

Kollet S., F. Gasper, S. Brdar, K. Goergen, H.-J. Hendricks Franssen, J. Keune, W. Kurtz, V. Küll, F. Pappenberger, S. Poll, S. Trömel, P. Shrestha, C. Simmer, M. Sulis (2018), Introduction of an Experimental Terrestrial Forecasting/Monitoring System at Regional to Continental Scales Based on the Terrestrial System Modeling Platform (v1. 1.0). Water. MDPI

Barros A. P., P. Shrestha, S. Chavez, Y Duan (2018), Modeling Aerosol-Cloud-Precipitation Interactions in Mountainous Regions: Challenges in the Representation of Indirect Microphysical Effects with Impacts at Subregional Scales. Atmospheric Chemistry (Intech Open). doi:10.5772/intechopen

Shrestha, P., W. Kurtz, G. Vogel, J.-P. Schulz, M. Sulis, H.-J. Hendricks Franssen, S. Kollet and C. Simmer (2018), Connection Between Root Zone Soil Moisture and Surface Energy Flux Partitioning Using Modeling, Observations, and Data Assimilation for a Temperate Grassland Site in Germany. JGR-Biogeosciences doi: 10.1029/2016JG003753

Sulis, M., J. Keune, P. Shrestha, C. Simmer, S. Kollet (2018), Quantifying the impact of subsurface-land surface physical processes on the predictive skill of subseasonal mesoscale atmospheric simulations. JGR-Atmospheres doi: 10.1029/2017JD028187

Shrestha, P., M. Sulis, C. Simmer, S. Kollet (2018), Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP. J. Hydrol., doi: 10.1016/j.jhydrol.2018.01.024

Poll, S., P. Shrestha and C. Simmer (2017), Modelling Convectively Induced Secondary Circulations in the Terra Incognita with TerrSysMP. QJRMS, doi: 10.1002/qj.3088

Sulis, M., J. L. Williams, P. Shrestha, M. Diedrich, C. Simmer, S. Kollet and R. Maxwell (2017), Coupling groundwater, vegetation and atmosphere processes: a comparison of two integrated models. JHM ,doi:10.1175/JHM-D-16-0159.1

Keune, J., F. Gasper, K. Goergen, A. Hense, P. Shrestha, M. Sulis, and S. Kollet (2016), Studying the influence of groundwater representations on land surface-atmosphere feedbacks during the European heat wave in 2003, J. Geophys. Res. Atmos., 121, doi:10.1002/2016JD025426.

Shrestha, P. and M. Sulis (2015): Coupled Terrestrial Model Systems - Using TerrSysMP to develop a quantitative understanding of the soil-vegetation-atmosphere interaction. CRC/TR32 Database (TR32DB), doi:10.5880/TR32DB.18

Shrestha, P., M. Sulis, C. Simmer and S. Kollet (2015). Impacts of grid resolution on surface energy fluxes simulated with an integrated surface-groundwater flow model. HESS, 19, 4317-4326, doi:10.5194/hess-19-4317-2015

Vogel G., P. Shrestha, J.-P. Schulz, C. Becker and U. Rummel (2015). Modelluntersuchungen zum Einfluss der Abschattung der Solarstrahlung durch die Vegetation auf die Erdbodentemperaturen in Falkenberg. MOL-RAO aktuell 03/2015.

Shrestha, P., A. P. Dimri, A. Schomburg and C. Simmer (2015). Improved understanding of an extreme rainfall event at the Himalayan foothills-a case study using COSMO. Tellus A, 67, 26031 doi:10.3402/tellusa.v67.26031

Sulis, M., M. Langensiepen, P. Shrestha, A. Schickling, C. Simmer and S. Kollet (2015). Evaluating the influence of plant-specific physiological parameterizations on the partitioning of land surface energy fluxes. JHM, 16(2), 517-533. doi:10.1175/JHM-D-14-0153.1

Simmer, C. et al. (2015). Monitoring and Modeling the Terrestrial System from Pores to Catchments-the Transregional Collaborative Research Center on Patterns in the Soil-Vegetation-Atmosphere System. BAMS. doi:10.1175/BAMS-D-13-00134.1

Gasper, F., K. Goergen, P. Shrestha, M. Sulis, J. Rihani, M. Geimer and S. Kollet (2014). Implementation and scaling of the fully coupled Terrestrial Systems Modeling Platform (TerrSysMP v1. 0) in a massively parallel supercomputing environment a case study on JUQU EEN (IBM Blue Gene/Q). GMD, 7(5), 2531-2543. doi:10.5194/gmd-7-2531-2014

Shrestha, P., M. Sulis, M. Masbou, S. Kollet and C. Simmer (2014). A scale-consistent terrestrial systems modeling platform based on COSMO, CLM, and Parflow. MWR, 142(9), 3466-3483 doi:10.1175/MWR-D-14-00029.1.

Shrestha, P., A. P. Barros and A. Khlystov (2013). CCN estimates from bulk hygroscopic growth factors of ambient aerosols during the pre-monsoon season over Central Nepal. Atm. Env., 67, 120-129 doi:10.1016/j.atmosenv.2012.10.042.

Shrestha, P. (2011). Characterization of Pre-Monsoon Aerosol and Aerosol-Cloud-Rainfall Interactions in Central Nepal. Duke University Dissertation.

Brun, J., P. Shrestha and A. P. Barros (2011). Mapping aerosol intrusion in Himalayan valleys using the Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO). Atm. Env., 45(35), 6382-63 doi:10.1016/j.atmosenv.2011.08.026.

Shrestha, P., and A. P. Barros (2010). Joint spatial variability of aerosol, clouds and rainfall in the Himalayas from satellite data. ACP, 10(17), 8305-8317 doi:10.5194/acp-10-8305-2010.

Shrestha, P., A. P. Barros, and A. Khlystov (2010). Chemical composition and aerosol size distribution of the middle mountain range in the Nepal Himalayas during the 2009 pre-monsoon season. ACP, 10(23), 11605-11621 doi:10.5194/acp-10-11605-2010.

Barros, A. P., O. P. Prat, P. Shrestha, F. Y. Testik, and L. F. Bliven (2008). Revisiting Low and List (1982): Evaluation of raindrop collision parameterizations using laboratory observations and modeling. JAS, 65(9), 2983-2993 doi:10.1175/2008JAS2630.1.

Supervised Thesis

Poll, S. (2016). Modeling Convectively Induced Secondary Circulations in the Terra Incognita with TerrSysMP. Masters Thesis, Meterological Institute, The University of Bonn, Germany - with Clemens Simmer

Conducted Trainings

Fall School 2019 HPSC-TerrSys at MIUB, 24.09.2019

TerrSysMP Winter School 2017 at TU Central Department of Physics, 26.12.2017

Fall School 2017 HPSC-TerrSys at MIUB, 10.10.2017

Fall School 2016 HPSC-TerrSys at MIUB, 14.10.2016

HPSC TerrSys Research Training Day "TerrSysMP Hand-On Training" at JSC, 25.11.2015

IRTG Research Training Day "Coupled Terrestrial Model System" at MIUB, 23.10.2015

Presentations (Talks and Posters)

2019

S. Poll, P. Shrestha and C. Simmer (2019). E ects of Land Surface Heterogeneity on the Simulated Atmo- spheric Boundary Layer Structure. UCP2019


2018

P. Shrestha, T. Hoar, J. Anderson, W. Kurtz, H.-J. Hendricks Franssen, F. Gasper, B. Schalge, M. Sulis, S. Kollet and C. Simmer (2018). TerrSysMP-DART Interface: An Integrated data assimilation platform for coupled atmosphere, land surface and groundwater model. TR32IC

P. Shrestha, W. Kurtz, G. Vogel, J.-P. Schulz, M. Sulis, H.-J. Hendricks Franssen, S. Kollet and C. Simmer (2018). Understanding the connection between root zone soil moisture and surface energy flux partitioning using modeling, observations and data assimilation for a temperate grassland site in Germany. TR32IC

M. Sulis, V. Couvreur, J. Vanderborght, I. Trebs, J. Keune, P. Shrestha, H. Vereecken, C. Simmer, S. Kollet (2018). Incorporating a root water uptake model based on the hydraulic architecture approach in terrestrial systems simulations. TR32IC

S. Poll, P. Shrestha, C. Simmer (2018). Effects of Land Surface Heterogeneity on Simulated Boundary-Layer Structure. TR32IC

T. Zerenner, P. Shrestha, P. Moss, V. Venema, P. Friederichs and C. Simmer (2018). Impact of downscaled atmospheric forcing on surface energy flux partitioning. TR32IC

H-J Hendricks-Franssen, Prabhakar Shrestha, W. Kurtz1,2, B. Naz, H. Zhang, S. Kollet, C. Simmer, and H. Vereecken (2018). Coupled Data Assimilation with TerrSysMP. ISDA2018

2017

Shrestha P. (2017). Investigating the impact of land use changes on aerosol-cloud interactions using polarimetric radar retrievals.TU,Central Deparment of Physics, Invited Talk

Shrestha P., S. Troemel and C. Simmer (2017). Investigating the impact of land use changes on aerosol-cloud interactions using polarimetric radar retrievals. AGU2017

Poll S., P. Shrestha and C. Simmer (2017).Modeling Convectively Induced Secondary Circulations (CISCs) in the Terra Incognita. AGU2017

Shrestha P., S. Troemel and C. Simmer (2017). Does surface energy flux heterogeneity impact aerosol-cloud interactions? Aerosols, Clouds, Precipitation and Climate (ACPC)

Poll S., P. Shrestha and C. Simmer (2017). Effects of Land Surface Heterogeneity on Simulated Boundary-Layer Structure From the LES to the Meso Scale.COSMO/CLM/ICON/ART User Seminar 2017

Shrestha P. and S4 team (2017). Scientific Highlights of S4. HD(CP)2 Annual Meeting, Munich Universitaet.S4

2016

Shrestha P., T. Hoar, J. L Anderson, W. Kurtz, H.-J. H. Franssen, F. Gasper, B. Schalge, M. Sulis, S.J. Kollet, C. Simmer (2016). TerrSysMP-DART Interface: An Integrated Data Assimilation Platform for Coupled Atmosphere, Land Surface and Groundwater Model. AGU2016.

Hoar T., et al., DART: A Community Facility Providing State-of-the-Art, Efficient Ensemble Data Assimilation for Large (Coupled) Geophysical Models. AGU2016

Kollet S., K. Goergen, H. Vereecken, H.-J. H. Franssen, J. Keune, K. Kulkarni, W. Kurtz, W. Sharples, P. Shrestha, C. Simmers, J. Vanderborght, 2016: Terrestrial Monitoring from Aquifers into the Atmosphere: Merging Integrated Models with Observations. AGU2016

Sulis M., P. Shrestha, J. Keune, F. Gaspar, K. Goergen, C. Simmer and S. Kollet (2016). Groundwater-landsurface-atmosphere simulations: An overview of experiences and results using TerrSysMP. IGEM workshop .

Kurtz W., M. Sulis, P. Shrestha, H. Vereecken, S. Kollet and H.-J. H. Fr anssen (2016). Jackknife experiments for soil moisture assimilation at the catchment scale using a cosmic-ray sensor network. DAFAOH - HEPEX - FOR2131. Workshop on Data Assimilation.

Poll S., P. Shrestha and C. Simmer (2016). Modeling Convectively Induced Secondary Circulations (CISCs) in the Terra Incognita. EMS2016-587

Kollet, S., K. Goergen, F. Gasper, H.-J. H. Franssen, J. Keune, K. Kulkarni, W. Kurtz, W. Sharples, P. Shrestha and M. Sulis (2016). Terrestrial simulations from groundwater into the atmosphere over Europe and North Rhine Westphalia, Germany. GEWEX-CPCM-WS

Shrestha P. (2016). Improving our understanding of flux partitioning using the Terrestrial Systems Modeling Platform (TerrSysMP).Duke University, Invited Talk

Kurtz W., M. Sulis, P. Shrestha, G. He, S. Kollet, H. Vereecken and H.-J. H. Franssen (2016). Assimilation of soil moisture data with the integrated terrestrial system modeling platform TerrSysMP at the catchment scale. CMWR2016.

Sulis M., P. Shrestha, J. Keune, S. Steinke, M. Diedrich, J. Schween, S. Crewell, C. Simmer and S. Kollet (2016). An integrated assessment of the catchment-scale energy and water balance using a terrestrial systems modeling platform and observations.EGU2016.

Kollet S., K. Goergen, H. Vereecken, F. Gasper, H.-J. H. Franssen, J. Keune, K. Kulkarni, W. Kurtz, W. Sharples, P. Shrestha, C. Simmer, M. Sulis and J. Vanderborght (2016).The Centre of High-Performance Scientific Computing, Geoverbund, ABC/J – Geosciences enabled by HPSC. EGU2016.

Shrestha P., G. Vogel, W. Kurtz, J.-P. Schulz, M. Sulis, C. Simmer, S. Kollet and H.-J. H. Franssen (2016).Intercomparison of multi-model simulations of day time boundary layer evolution-III. DWD2016.

Shrestha P., A.P. Dimri, A. Schomburg and C. Simmer (2016). Improved Understanding of an Extreme Rainfall Event at the Himalayan Foothills. DWD2016.

Shrestha P., M. Sulis, S. Kollet and C. Simmer (2016). Improvements and scientific validation of CLM in the framework of the Terrestrial Systems Modeling Platform (TerrSysMP). NCAR/LMWG2016.

2015

Shrestha P., A.P. Dimri, A. Schomburg and C. Simmer (2015). Improved Understanding of an Extreme Rainfall Event at the Himalayan Foothills. AGU2015.

Shrestha P. (2015), Modeling the terrestrial system in TR32. TR32 Phase 3 Scientific Defense.

Will add more later ....

Downloads

Porting of CLM5.0 to JSC machines
R scripts for fitting CCN spectra ~ f(U,T,P)
CDO tools to interpolate and analyze BIG DATA
QuickView of ParFlow Binary Files (viewPFB), need CISL NCL and ncview installed

blogs

2017 Monsoon Flood
InterBasin Water Transfer
Rainy Dashain?
Rain Pattern
El Nino and Monsoon
hills of Kathmandu hills of Kathmandu
ParFlow Pulse
Extreme Rainfall
SVA System
Election Nepal 2017
Interactive d3.js
Election Nepal 2013
BIT Migration
Fossil Fuel Nepal
USGS EarthQuake
CO2 time-series
Venus-Earth Tango