Preprints
https://doi.org/10.5194/egusphere-2024-14
https://doi.org/10.5194/egusphere-2024-14
29 Jan 2024
 | 29 Jan 2024

Unravelling Disparities in Eulerian and Lagrangian Moisture Tracking Models in Monsoon- and Westerlies-dominated Basins Around the Tibetan Plateau

Ying Li, Chenghao Wang, Qiuhong Tang, Shibo Yao, Bo Sun, Hui Peng, and Shangbin Xiao

Abstract. Beyond traditional meteorological and (paleo)climatological analyses, numerical moisture tracking provides a quantitative diagnosis of moisture sources to the Tibetan Plateau (TP). While existing studies predominantly employ either the Eulerian or Lagrangian method, the potential differences in their simulations and the underlying causes of these discrepancies remain unexplored. In this study, we compare the applications of the most widely used Eulerian (WAM-2layers) and Lagrangian (FLEXPART-WaterSip) models in the TP, specifically in an Indian Summer Monsoon (ISM)-dominated basin (Yarlung Zangbo River Basin, YB) and a westerlies-dominated basin (upper Tarim River Basin, UTB). Compared to FLEXPART-WaterSip, WAM-2layers generally estimates higher moisture contributions from westerlies-dominated and distant source regions but lower contributions from local recycling. However, WAM-2layers simulations can be improved by using higher spatial-temporal resolution forcing data. The inherent ability in WAM-2layers to distinguish between evaporation and precipitation makes it more effectively in identifying varying moisture contributions arising from distinct surface evaporation sources. In contrast, in regions heavily influenced by smaller-scale convective systems with high spatial heterogeneity, such as the UTB when compared to the YB, simulations from FLEXPART-WaterSip tend to be more reliable. However, FLEXPART-WaterSip is prone to introducing additional errors when using specific humidity information in particles to infer moisture uptake and loss, although it accurately depicts the three-dimensional movement of air particles.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Ying Li, Chenghao Wang, Qiuhong Tang, Shibo Yao, Bo Sun, Hui Peng, and Shangbin Xiao

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Review: "more careful conclusions needed and a call for open science"', Ruud van der Ent, 28 Feb 2024
    • AC2: 'Reply on RC1', Ying Li, 18 Apr 2024
  • RC2: 'Comment on egusphere-2024-14', Harald Sodemann, 09 Mar 2024
    • AC1: 'Reply on RC2', Ying Li, 18 Apr 2024
Ying Li, Chenghao Wang, Qiuhong Tang, Shibo Yao, Bo Sun, Hui Peng, and Shangbin Xiao
Ying Li, Chenghao Wang, Qiuhong Tang, Shibo Yao, Bo Sun, Hui Peng, and Shangbin Xiao

Viewed

Total article views: 391 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
292 82 17 391 33 6 6
  • HTML: 292
  • PDF: 82
  • XML: 17
  • Total: 391
  • Supplement: 33
  • BibTeX: 6
  • EndNote: 6
Views and downloads (calculated since 29 Jan 2024)
Cumulative views and downloads (calculated since 29 Jan 2024)

Viewed (geographical distribution)

Total article views: 390 (including HTML, PDF, and XML) Thereof 390 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 12 Jun 2024
Download
Short summary
This study compare the applications of the most widely used Eulerian (WAM-2layers) and Lagrangian (FLEXPART-WaterSip) models in the Tibetan Plateau. WAM-2layers is more effectively in identifying varying moisture contributions arising from distinct surface evaporation sources, while FLEXPART-WaterSip tend to be more reliable in regions heavily influenced by smaller-scale convective systems with high spatial heterogeneity.