ITCZ structure as determined by parameterized versus explicit convection in aquachannel and aquapatch simulations
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields



Document Data
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page


ITCZ structure as determined by parameterized versus explicit convection in aquachannel and aquapatch simulations

Filetype[PDF-6.42 MB]

Select the Download button to view the document
This document is over 5mb in size and cannot be previewed


  • Journal Title:
    Journal of Advances in Modeling Earth Systems
  • Personal Author:
  • NOAA Program & Office:
  • Description:
    Numerous studies using both global and regional models of the atmosphere have found daunting sensitivities of the structure and dynamics of the intertropical convergence zone (ITCZ) to the representations of unresolved processes, particularly the convective parameterization (CP). Evaluations of these results by comparison to high-resolution simulations with explicit convection have been rather limited, due to the large computational burden of using grid spacings less than 10 km over large domains representative of the Earth's tropics. This study introduces a framework that allows the use of cloud-resolving grid spacings over the tropics and larger spacings over remainder of the domain. The Weather Research and Forecasting (WRF) model is used in an “aquachannel” beta-plane configuration, zonally periodic with length equal to that of the real equator. This model reproduces the general circulation and eddy statistics of similarly configured aquaplanet models. A channel shortened to one third the length of the equator (the “aquapatch”) also reproduces the zonal-mean circulations and eddies. Finally, nested grids embedded in the aquapatch are used to simulate tropical convection with 5.15 km resolution. The nested 5.15 km simulations produce broader and lighter rainfall distributions, making single ITCZs wider and smoothing out double ITCZ structures. They also show quite different rainfall production rates for atmospheric parameters such as convective available potential energy (CAPE) and column relative humidity (CRH). The apparent reason for these differences is that the higher resolution allows for the representation of squall lines and associated cold pools that propagate meridionally, redistributing rainfall away from the ITCZ.
  • Source:
    J. Adv. Model. Earth Syst., 8(1), 425-452.
  • DOI:
  • Document Type:
  • Rights Information:
  • Compliance:
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

More +

You May Also Like

Checkout today's featured content at

Version 3.26.1