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Using iCESM for Moisture Source Attribution and Precipitation Recycling Analysis

hadi

hadi
New Member
Dear iCESM Development Team and Community,


I am a researcher working on atmospheric moisture transport and precipitation recycling. I am interested in using iCESM to quantify moisture source contributions—specifically, determining the fraction of precipitation over the South US that originates from evaporation in the other remote sources.


From the literature (e.g., Nusbaumer & Noone, 2018; Dyer et al., 2017), I understand that iCESM includes water tagging capabilities that can track moisture from user-defined source regions through the hydrological cycle. However, I would appreciate clarification on the following:


  1. Moisture source attribution: Can iCESM's water tagging framework explicitly quantify precipitation recycling ratios (i.e., the fraction of precipitation in a target region originating from a specific source region)?
  2. Regional configuration: Is it feasible to define custom tagged regions such as the Gulf of Mexico, and track the subsequent contribution of that moisture to precipitation over continental areas like Texas?
  3. Model version: Would iCESM1.2 or iCESM1.3 be more appropriate for this type of regional moisture source analysis?
  4. Computational requirements: What is the typical computational cost for running water tagging simulations, and are there recommended best practices for defining the number and spatial extent of tagged source regions?

I would be grateful for any guidance, documentation references, or examples of similar applications. If there are existing datasets or published simulations that address moisture sources over the south-central United States, I would also appreciate pointers to those resources.


Thank you in advance for your time and assistance.


Best regards,
 
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