Abstract
The response of surface winds over the equatorial Pacific to cloud-related parameters is quantified by using a uniform sampling method and conducting a large number of perturbed parameter simulations. The results show that the surface winds are highly sensitive to, and even linearly dependent on some parameters that include the precipitation efficiency for deep convection (C0_deep), the time scale for the consumption rate of shallow CAPE (CMFTAU), and the threshold value for RH for deep convection (RHCRIT), indicating the potential to improve surface wind simulations by tuning these parameters. Parameter changes indirectly affect surface winds through changes in vertical velocity or deduced circulation linked to diabatic heating (DH) above the surface. The relative contribution of static stability changes induced by perturbed parameter to balancing DH and affecting vertical velocity exceeds 10% in most of the troposphere.
| Original language | English |
|---|---|
| Pages (from-to) | 458-465 |
| Number of pages | 8 |
| Journal | Atmospheric Science Letters |
| Volume | 18 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2017 |
| Externally published | Yes |
Funding
This work was jointly funded by the National Key Research Project (grant no. 2016YFB0200805), the National Natural Science Foundation of China (grant nos. 41622503, 41475043, 41405073, 41775101, and 91530323), Open Fund of Key Laboratory of Data Analysis and Applications, SOA (grant no. LDAA-2014-03), and the National Key Basic Research Program of China (grant no. 2015CB954101).
Keywords
- diabatic heating
- static stability
- surface wind
- uncertain parameter