I2 Regional Aspects of ACC through regional models

1
I2 Regional Aspects of ACC through regional models
2
To explore regional aspects of ACC through CLIVAR
regional studies, including use of regional
models.

• What are the factors that make a region to be
  poorly (or adequately) represented?

• Teleconnection mechanisms?
• (O-A-L)
• Regional processes?
• (O-A, L-A, O-A-L)

3
To explore regional aspects of ACC through CLIVAR
regional studies, including use of regional
models.
Regional Features in Claris-LPB and AMMA case
studies (Prepared by Daniela Jacob, for the
CLARIS-LPB meeting at the Lund RCM Wshop) But
applicable to NARCCAP, Asian Monsoon, Somali Jet)

• (Some) dynamical flow features in the regions
• ITCZ, SACZ
• Subtropical highs
• Trades/monsoons (WAM)
• Jet streams (AEJ, LLJ)
• Mesoscale convective systems (MCS)
• Regional/local characteristics
• Land sea/lake breezes, orography (eg. Ethiopian
  highlands, Andes)
• Studies of interactions of large scale flows with
  convective systems using high resolution models
  are part of both AMMA and Claris-LPB (RCM)
• High resolutions for oceans and along the coast
  also needed (coupled AORCM)

4
To explore regional aspects of ACC through CLIVAR
regional studies, including use of regional
models.

• Improvement of regional scenarios
• Need to understand why a region is poorly
  represented, but as important, why other regions
  are properly represented -both through process
  studies (e.g., role of land cover changes)
• Identify a useful set of metrics to assess
  vulnerability (time or temperature approach?
  Ref Ongoing discussion in Claris LPB)
• Such questions require the involvement of
  regional projects with an understanding of the
  regional climate.
• - TFRCD - WGCM
• - CORDEX (COordinated Regional climate
  Downscaling Experiment)
• - NARCCAP
• - CLARIS-LPB
• - AMMA

5
To explore regional aspects of ACC through CLIVAR
regional studies, including use of regional
models.

• Timeline depends on TFRCD and CORDEX progress,
  but links should be established within one year.
• Identify common subjects of interest (e.g., at
  the recent RCM meeting in Lund it became evident
  that groups like NARCCAP, Claris LPB and AMMA
  have many issues in common)
• (List the needs from national/regional programs)
• CLIVAR regional groups need to begin
  interactions with the modeling community,
  particularly the TFRCD. Joint workshop?
• List the needs from CLIVAR (workshops, working
  group etc.)