the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Weather systems associated with synoptic variability in the moist margin
Abstract. The moist margin is a sharp gradient of humidity that separates the moist deep tropics from the drier subtropics, and its movement is known to have an important effect on rainfall variability. In this work, we investigate how weather systems are related to synoptic variability in the moist margin. The weather systems considered include convectively coupled equatorial waves and the Madden-Julian Oscillation (MJO), monsoon low-pressure systems (LPS), and extratropical interactions with the moist margin characterised by upper-level potential vorticity (PV). We use an object-based approach in which first, objects are defined to describe the variability of the moist margin, and then are related to weather objects representing the above weather systems. Overall, the results indicate that these weather systems are associated with a large proportion of variability in the moist margin. The MJO and equatorial Rossby wave have a significant modulating effect on the moist margin. In comparison, monsoon LPS are infrequent but strongly influence the moist margin when they occur. Interactions with the extratropics occur for around one quarter of moist margin perturbations, and display a clear wave-like signal, often with anticyclonic PV anomalies near the perturbed margin and cyclonic PV anomalies remotely. Overall, objects associated with weather systems are larger, longer-lived, and precipitate more, highlighting the important role of weather systems.
- Preprint
(4334 KB) - Metadata XML
- BibTeX
- EndNote
Status: final response (author comments only)
-
RC1: 'Comment on egusphere-2024-3150', Andries Jan De Vries, 08 Nov 2024
The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3150/egusphere-2024-3150-RC1-supplement.pdf
-
RC2: 'Comment on egusphere-2024-3150', Anonymous Referee #2, 23 Dec 2024
The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3150/egusphere-2024-3150-RC2-supplement.pdf
-
AC1: 'Comment on egusphere-2024-3150', Corey Robinson, 14 Jan 2025
We would like to thank both reviewers for their thoughtful and constructive feedback. The comments provided have been greatly valuable and we believe have made substantial improvements to the manuscript. Please see the attached file for our responses to all comments.
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
175 | 93 | 16 | 284 | 4 | 5 |
- HTML: 175
- PDF: 93
- XML: 16
- Total: 284
- BibTeX: 4
- EndNote: 5
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1