A comparative analysis of the horizontal resolution impacts in - PowerPoint PPT Presentation

A comparative analysis of the horizontal resolution impacts in simulated climate over South America Rosmeri Porfírio da Rocha Departamento de Ciências Atmosféricas, USP, Brazil rosmerir@model.iag.usp.br Michelle Simões Reboita – UNIFEI – Brazil Marta Llopart – UNESP - Brazil

Motivation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

Objectives R !"# $%&'(&)$# )*$# +,-&.)# "/# (0+12# 31$# *"4+5"1)&'# 24+6# 0-&.+12# +1# 7$289:# )"# 0+,('&)$#)*$#.'+,&)$#"%$4#;"()*#<,$4+.&#=;<>?## && & & Y/+& /#5(6#2*%"& 5+-#".7#2& '#2*5#"-& #2& MI& '"()%*+& 1(""& $+& ,(-'.--+,& '#2-(,+5(2:Z& & & N+:OPG& -()."%7#2-& .-(2:& AD& %2,& DB& T)& :5(,& -9%'(2:& %2,& 3#.5& '#20+'70+& 9%5%)+*+5(6%7#2-& ! &()9%'*-&#2&-()."%*+,&'"()%*+&3#5&ABBD&8+%5&%2,&/(:/&35+[.+2'8& 0%5(%$("(*8@& & &&

RegCM4 simulations using 25 and 50 km grid spacing and four convective parameterizations M()."%7#2-&1+5+&'%55(+,&#.*&.-(2:& 7$289: &>N+:(#2%"&O"()%*+& P#,+"&R&0+5-(#2&G@G@DE&#0+5&*/+& 6",&+1#."%$4+12#;"()*#<,$4+.& & %2,&%,=%'+2*&#'+%2-&>OLNF\]&-.$,#)%(2E& @1$#6",&+1#A+)*#)A"# IP^& 6+B$4$1)#24+6#0-&.+12C# DE#&16#FD#G,# ?VW& F#)%(2&%2,&*#9#:5%9/8&#3&!DB&%2,&!AD&-()."%7#2-@&

Data and Methodology ;+,('&M"10#6$0+21C## V"4+5"1)&'#24+6#0-&.+12#C#DE#=PDE>#&16#FD#=PFD>#G,# W(,H$4#"/#0+2,&#'$%$'0# _&AS # !"-"24&-*J#&16#'&16K(0$C# `M!M&%2,&!?O&>?#0+"%2,&+*& @H0$4%$6#6&)&# %"@&ABBBE& 7&+1/&''C# U1+M&'#&16#H"(16&4J#."16+M"10#X#;;!C## \5%Ra2*+5()& I&+'J#,$&1#%&'($0#/4",C# L$4+"6 Z&&ABBD&8+%5&>35#)&BBZBB&`YO&&BCK&F+'KABBG&.27"& K#8'+,&)$#L4$6+.M"1#8$1)$4##=8L8>#N#4&+1/&''#6&)&#="1'J# BCKb%2KABBcE& 4&+1#2&(2$#&1&'J0+0#A+)*#24+6#"/#E?D " >O## & K#P'"H&'#;&)$''+)$#9&--+12#"/#L4$.+-+)&M"1##=P;9&L>C# L*J0+.&'#-&4&,$)4+5&M"10C## 6$4+%$6#/4",#0&)$''+)$#=24+6#"/#E?Q " >#O# ;(4/&.$#0.*$,$C# WIYM& <+4#)$,-$4&)(4$C# Y"(4#."1%$.M%$#-&4&,$)4+5&M"10C# && 87R#N#E?D#S#E?D#&1&'J0+0## &\)%2.+"&>\)%E;& T4&U1)$4+,#=I$$#$)#&'?#FEQQ># ! #+)#*&0#&00+,+'&)$6#F#,# & &!5+""RX5(*-'/&O/%99+""&>!3'E;&& &+4#)$,-$4&)(4$#&16#*(,+6+)J## &!5+""RI5%T%1%&M'/.$+5*&>!%-E& & &d%(2RX5(*-'/&>dXE@&

G50 simulations and observations of mean annual rainfall for 2005 8L8# P;9&L# T,&1($'#DE#G,# ZY#DE#G,# P<;#DE#G,# PY8#DE#G,# ?%5:+&%:5++)+2*&$+*1++2&#$-+50+,&%2,&-()."%*+,&5%(23%""Z& T,&1($'#&16#ZY# # P&0 Z&-()."%*+,&-9%7%"&9%Q+52&#3&5%(23%""&,#+-&2#*&5+-+)$"+-&*/+&#$-+50+,&#2+& & P/. Z&%&-)%""&()95#0+)+2*&'#)9%5+,&1(*/&!%-&(2&*/+&5+95#,.'7#2&#3&#$-+50+,&9%Q+52&#3&5%(23%""&

Annual (2005 year) rainfall bias: Simulations x CPC PDE# T,&1($'# ZY# P<;# PY8# ! O#))#2&%""&9%5%)+*+5(6%7#2-Z&,58&$(%-&#0+5& 0"()*#[4&5+'#&16#R4(2(&J &>1/('/&(-&9%5*&#3&?%&V"%*%&W%-(2&R&?VW&E& (2&!DB&& ! &\)%2.+";&!3'&%2,&!%-&-'/+)+-Z&,58&$(%-&,+'5+%-+-&,5%-7'%""8&(2&*/+&!ADH&*/(-&(-&2#*&2#*+,&(2&dX&& ! <,&5"1#H&0+1 Z&&\)%2.+"&%*&!DB&/%-&%&"%5:+&1+*&$(%-;&1/('/&,+'5+%-+-&%*&!AD@&& &!3';&!%-&%2,&dX&/%0+&,58&$(%-&(2&!DB&*/%*&,+'5+%-+-&(2&!AD@&& & T,&1($'# P<;# PY8# ZY# PFD#

Annual (2005 year) rainfall bias: Simulations x GSMaP PDE# T,&1($'# ZY# P<;# PY8# ! M()."%7#2-&<&!-P%VZ&M9%7%"&9%Q+52-&#3&5%(23%""&$(%-+-&%5+&-()("%5&*/%*&#3&M()."%7#2-&<&OVO@& F(J+5+2'+-&(2&(2*+2-(*8Z&&,58&$(%-&%5+&"%5:+&#0+5&?VW&(2&*/+&'#)9%5(-#2-&M()."%7#2-&]&!MP%V@& & ! N%(23%""&$(%-+-&/%0+&*/+&-%)+&-(:2%"&(2&!AD;&$.*&(2&)#,."+&*/+8&%5+&-)%""+5&(2&!AD@&& PFD# T,&1($'# P<;# PY8# ZY#

Impact of resolution: difference of annual rainfall between 25 and 50 km (G25 minus g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

Annual (2005 year) air temperature bias: Simulations x mean of observations (EraInterim and CRU) !DB& ZY# T,&1($'# P<;# PY8# P&0C# (*&(-&2#*+,&%& P/.C# '#",&$(%-&'#0+5-&)#-*&#3& T,&1($' Z&!AD&,+'5+%-+-& ZYC# 1%5)&$(%-&(2&)#-*& '/%2:+&#3&*/+& M#.*/&I)+5('%&(2&!DBH&(*&(-& */+&*+)9+5%*.5+&$(%-&(2&%""& 9%5*&#3&'#272+2*& 95+,#)(2%2'+&#3& %''+2*.%*+,&(2&!AD& ,#)%(2& ,+'5+%-+&(2&dXAD& 1%5)&>!DBE&*#&'#",& $(%-&>!ADE& T,&1($'# P<;# PY8# ZY# !AD&

Impacts of resolution: difference of annual air temperature in 25 and 50 km (G25 minus G50) T,&1($'# ZY# P<;# PY8# A general behavior of the parameterizations: - over continent the air temperature are lower in G25 than in G50 - differences between G25 and G50: are larger in Gas and smaller in Emanuel