Weather systems associated with synoptic variability in the moist margin

Robinson, Corey; Narsey, Sugata; Jakob, Christian; Nguyen, Hanh

doi:https://doi.org/10.5194/wcd-6-369-2025

Articles | Volume 6, issue 2

https://doi.org/10.5194/wcd-6-369-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wcd-6-369-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 6, issue 2

Research article

|

07 Apr 2025

Research article |

| 07 Apr 2025

Weather systems associated with synoptic variability in the moist margin

Corey Robinson, Sugata Narsey, Christian Jakob, and Hanh Nguyen

Data sets

Global Precipitation Climatology Project (GPCP) Climate Data Record (CDR), Version 1.3 (Daily) R. Adler et al. https://doi.org/10.5065/ZGJD-9B02

Global track dataset of monsoon low pressure systems S. Vishnu et al. https://doi.org/10.5281/zenodo.3890646

ERA5 hourly data on single levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

NOAA Interpolated Outgoing Longwave Radiation (OLR) B. Liebmann and C. A. Smith https://psl.noaa.gov/data/gridded/data.olrcdr.interp.html

Model code and software

antarcticrainforest/tintX: New user interface Martin Bergemann and Martin Jucker https://doi.org/10.5281/zenodo.7051229

Short summary

Rainfall in the tropics is strongly related to the amount of moisture in the atmosphere. In this work, we examine a measure of moisture called the “moist margin”, which describes a transition between rainy and clear regions of the tropics. We show that movement of the moist margin is often related to a variety of weather systems. Cases where tropical moisture moves far poleward are often related to low-pressure systems or large-scale waves in the extratropics.