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Fig2.18ERA5uwindtrendx.m
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Fig2.18ERA5uwindtrendx.m
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% ch2_fig18.m
%
% Description
% Generates Figure 2.18 in the IPCC Working Group I Contribution to the Sixth Assessment Report: Chapter 2
%
% Creator: Daoyi Gong (gdy@bnu.edu.cn)
% Creating Date: 19 December 2020
%
% computing U wind trend for ERA5
%
% Assume a confidence level for computing confidence intervals
%
pconf=0.9;
cn=-1.5; cx=1.5;
load BuDRd_18.dat;
C=BuDRd_18(:,1:3);
mon_str={'01','02','03','04','05','06','07','08','09','10','11','12'};
mon_name={'Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'};
for mon_num=1:12;
mon_name{mon_num}
eval(['load u' mon_str{mon_num}])
end % next mon
clf
figure
% title('Zonal wind trend')
for isea=1:4
%[wkdat=u01];
% eval(['wkdat=u' mon_str{mon_num} ';']);
% eval(['u_cli=u' mon_str{mon_num} '_cli;']);
% DJF;
if (isea ==1 ) wkdat=(u12(1:end-1,:,:)+u01(2:end,:,:)+u02(2:end,:,:))/3; u_cli=(u12_cli+u01_cli+u02_cli)/3; ssea={'DJF'};end
% MAM
if (isea ==2 ) wkdat=(u03+u04+u05)/3; u_cli=(u03_cli+u04_cli+u05_cli)/3; ssea={'MAM'};end
% JJA
if (isea ==3 ) wkdat=(u06+u07+u08)/3; u_cli=(u06_cli+u07_cli+u08_cli)/3;ssea={'JJA'};end
% SON
if (isea ==4 ) wkdat=(u09+u10+u11)/3; u_cli=(u09_cli+u10_cli+u11_cli)/3;ssea={'SON'};end
clear utrd utrdsig;
for ilat=1:length(plat)
for ilvl=1:length(plvl)
clear y; y=wkdat(:,ilvl,ilat);
% computing trend
% call ltr_OLSdofrNaN() function:
clear b cinthw sig DOFr rho pval;
[b,cinthw,sig,DOFr,rho,pval]=ltr_OLSdofrNaN(pyr(1:length(y(:)))/10,y(:),pconf);
utrd(ilvl,ilat)=b;utrdsig(ilvl,ilat)=pval;
end
end
z95=100*(1-utrdsig);
z95(z95 < pconf)=NaN; z95=z95 * 0;
% report trends and confidence intervals:
% fprintf(' %10s :%6.3f+-%5.3f, p-value=%7.5f\n','utrend',b,cinthw,pval)
fprintf('Max. tred %5.2f min. trend %5.2f\n',max(utrd(:)),min(utrd(:)));
kk=(log(1000.0)-log(double(plvl)))*8*5;
clear XX YY;
[XX,YY]=meshgrid(plat(1:12:end),min(kk):3:max(kk));
[X0,Y0]=meshgrid(plat,kk);
[ZZ]=griddata(double(X0),Y0,u_cli,double(XX),YY);
% figure;
% axes('position',[.1 .1 .4 .6])
% subplot(2,2,isea);
if (isea == 1); axes('position',[.1 .53 .33 .31]); end
if (isea == 2); axes('position',[.5 .53 .33 .31]); end
if (isea == 3); axes('position',[.1 .15 .33 .31]); end
if (isea == 4); axes('position',[.5 .15 .33 .31]); end
%contourf(plat,kk,u_cli);
trd_trim=utrd; %trd_trim(1,:)=NaN; trd_trim(end,:)=NaN;trd_trim(:,1)=NaN;trd_trim(:,end)=NaN;
pcolor(plat,kk,trd_trim);colormap(C); shading flat; % colorbar;
hold on; caxis([cn cx]);
[cc,ch]=contour(XX,YY,ZZ,(-1500:10:-10),'k--','linewidth',1.2);set(ch,'ShowText','on','TextStep',get(ch,'LevelStep')*2);
[cc,ch]=contour(XX,YY,ZZ,(10:10:1500),'k-','linewidth',1.2);set(ch,'ShowText','on','TextStep',get(ch,'LevelStep')*2);
%axis([-14 14 min(kk) max(kk)-0.5]);
if (isea == 1); ylabel('Pressure(hPa)'); end
if (isea == 3); ylabel('Pressure(hPa)'); end
% title([mon_name{mon_num}])
title([ssea])
set(gca,'linewidth',1.2);
axis([-91.5 91.5 min(kk)-1 max(kk)+1]);
set(gca,'YTick',flipud(kk));
ylbl=num2str(flipud(plvl(:)));ylbl(2:6,:)=' ';ylbl(8:11,:)=' ';ylbl(13,:)=' ';ylbl(15,:)=' ';ylbl(17,:)=' ';
ylbl(19,:)=' ';ylbl(21:22,:)=' ';ylbl(24,:)=' ';ylbl(26,:)=' ';
set(gca,'XTick',[-90:30:90]);set(gca,'XTickLabel',{'90S','60S','30S','0','30N','60N','90N'});
set(gca,'YTickLabel',ylbl);
z95=100*(1-utrdsig);
%z95(z95 < pconf)=NaN; z95=z95 * 0;
clear XS YS ZS X0 Y0;
[XS,YS]=meshgrid(plat(1:12:end),min(kk):3:max(kk));
[X0,Y0]=meshgrid(plat,kk);
[ZS]=griddata(double(X0),Y0,z95,double(XS),YS);
% [XS,YS]=meshgrid(plat,kk);
% Non-sig grids
XS=XS(:);YS=YS(:);ZS=ZS(:); ZS(ZS >= 100*pconf)=NaN; % ZS=ZS * 0;
k=find(ZS < 100*pconf); XS=XS(k);YS=YS(k);ZS=ZS(k);
% sig. grids
%XS=XS(:);YS=YS(:);ZS=ZS(:); ZS(ZS < 100*pconf)=NaN; % ZS=ZS * 0;
%k=find(ZS >= 100*pconf); XS=XS(k);YS=YS(k);ZS=ZS(k);
%hold on;plot(XS(1:2:end),YS(1:2:end),'+', 'MarkerEdgeColor','k',...
% 'MarkerFaceColor','k',...
% 'MarkerSize',1.5);
hold on;plot(XS(1:1:end),YS(1:1:end),'x', 'MarkerEdgeColor','k',...
'MarkerFaceColor','k',...
'MarkerSize',3.1);
end % next
set(gcf,'Renderer','painters');
% eval(['hgsave(''uwind_trd'')']); eval(['print -depsc2 -r600 uwind_trd.eps']);
% plotting legend
% figure;
% clf
axes('position',[.21 .13 .5 .08])
%xlabelstr='Linear trend slope (ms^{-1}decade^{-1})';
xlabelstr='Trend (ms^{-1} per decade)';
fontsizenum=13;
printformstr='-depsc';
foutstr='Uwind_Trend';
colormap(C)
hc=colorbar('southoutside')
caxis([cn cx])
set(gca,'Visible','off','Box','off')
set(gca,'FontSize',12)
set(get(hc,'XLabel'),'String',xlabelstr,'FontSize',fontsizenum,'Visible','on')
%pbaspect([1 0.1 1])
%print(foutstr,printformstr)
text(0.30,9.6,'Zonal wind trend','FontSize',14);
set(gcf,'Renderer','painters');
eval(['hgsave(''uwind_trd_sig'')']);
eval(['print -depsc2 -r600 uwind_trd_sig.eps']);