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Title: Accelerating the Lagrangian Particle Tracking in Hydrologic Modeling to Continental-Scale

Journal Article · · Journal of Advances in Modeling Earth Systems
ORCiD logo [1];  [2];  [1];  [3];  [4];  [1];  [5]; ORCiD logo [1]
  1. Princeton Univ., NJ (United States)
  2. NVIDIA Developer Technology, Austin, TX (United States)
  3. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  4. Nanjing Normal University (China)
  5. Univ. of Arizona, Tucson, AZ (United States)

Unprecedented climate change and anthropogenic activities have induced increasing ecohydrological problems, which have motivated the development of large-scale modeling for solutions. Water age/quality is as important as water quantity for understanding the water cycle. However, current scientific progress in tracking water parcels at large-scale with high spatiotemporal resolutions is far behind that in water balance/quantity owing to the lack of powerful tools. EcoSLIM is a particle tracking model that works with the hydrologic model ParFlow-CLM, which couples surface-subsurface hydrology with land surface processes. Here, we demonstrate a parallel framework to accelerate EcoSLIM to continental-scale on a distributed, multi-GPU platform with CUDA-Aware MPI. In tests from catchment-, to regional-, and then to continental-scale using 25-million to 1.6-billion particles, EcoSLIM shows significant speedup and excellent parallel performance. The parallel framework is portable to atmospheric and oceanic particle tracking models, where parallelization is inadequate and a standard parallel framework is absent. Parallelized EcoSLIM is a promising tool to accelerate our understanding of the terrestrial water cycle and the upscaling of subsurface hydrology to Earth system models.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
AC05-76RL01830; AC02-05CH11231
OSTI ID:
1985896
Report Number(s):
PNNL-SA-175029
Journal Information:
Journal of Advances in Modeling Earth Systems, Vol. 15, Issue 5; ISSN 1942-2466
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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