急MATLAB海温图绘制问题

在绘制海温图的时候温度出现温度数据问题，应该画出的图是

但我画出来

代码在这里

%读取全部海温资料，用select函数挑选经纬度和时间
ncdisp('./sst.mnmean.nc');
sst=ncread('./sst.mnmean.nc',"sst");
lon=ncread('./sst.mnmean.nc',"lon");
lat=ncread('./sst.mnmean.nc',"lat");  
time=ncread('./sst.mnmean.nc',"time");
sst_series = select( sst, 0, 88, 179, 88,time,lon,lat,[1950,2,1],[2021,2,1]);

%计算每年海温均值
for j=1:1:71
    for i=1:1:12
        if i==9
            m_sst(:,:,j)=mean(sst_series(:,:,(j-1)*12+i:(j-1)*12+i+3),3);
        end
    end
end

%取出逐年平均数据，去季节化
ncdisp('./sst.mon.ltm.nc');
sst_mean=ncread('./sst.mon.ltm.nc',"sst");
lon_mean=ncread('./sst.mon.ltm.nc',"lon");
loncount = length(lon_mean);  
lat_mean=ncread('./sst.mon.ltm.nc',"lat");
latcount = length(lat_mean);    
time_mean=ncread('./sst.mon.ltm.nc',"time");
ticount  = length(time_mean); 

sst_sta=(sst_mean(:,:,1)+sst_mean(:,:,11)+sst_mean(:,:,12))/3;
sst_d=m_sst(96:96+25,43:43+4,:)-sst_sta(96:96+25,43:43+4);

%判断El Nino&La Nina year
e=0;l=0;
for j=1:1:71
    if mean(sst_d(:,:,j),'all')>0.5 
        e=e+1;
        el(:,:,e)=m_sst(:,:,j);
    elseif mean(sst_d(:,:,j),'all')<0.5
        l=l+1;
        la(:,:,l)=m_sst(:,:,j);
    end
end
 
%绘图
boundary = [0 358 -88 88];              %设置经纬度范围
varname  = 'sst';                        %根据ncdisp显示的变量输入绘图
lon_scope  = find(lon_mean >= boundary(1) & lon_mean <= boundary(2));
lat_scope  = find(lat_mean >= boundary(3) & lat_mean <= boundary(4));
lon_number = length(lon_scope);
lat_number = length(lat_scope);
 
start   = [lon_scope(1),lat_scope(1),1];             %初始位置
count   = [lon_number,lat_number,ticount];           %读取范围
stride1 = [1,1,1];                                   %读取步长

sst_plot = imrotate(sst_sta, 90);                  %旋转矩阵，因为matlab是列优先
SST_plot = flipud(sst_plot); 
m_proj('Miller Cylindrical','lat',[boundary(3) boundary(4)],'lon',[boundary(1) boundary(2)]);
%投影并做图
lat_1       = linspace(boundary(3),boundary(4),lat_number);
lon_1       = linspace(boundary(1),boundary(2),lon_number);
[plon,plat] = meshgrid(lon_1,lat_1);
 
hold on
 
m_pcolor(plon,plat,SST_plot)             %添加画的内容
%m_coast('color',[0 0 0],'linewidth',1);  %绘制海岸线并填充陆地
%m_grid('box','fancy')                    %添加边框
%m_contourf(lon_1,lat_1,SST_plot,'linewidth',0.5);%绘制等温线
hold on
 
title('SST','fontsize',15)               %设置标题
colormap jet;                            %添加colorbar
h = colorbar('h');
set(get(h,'title'),'string','摄氏度℃'); 

看那个SST_plot数据也不是两种温度啊

“该回答引用ChatGPT”
可以采纳下面方法，请测试代码的可用性：
有用还望采纳，谢谢！

% Load the data
load data.mat

% Plot the sea surface temperature
figure
pcolor(lon,lat,SST);
shading flat
colorbar
caxis([10 30]) % Set color axis limits
xlabel('Longitude')
ylabel('Latitude')
title('Sea Surface Temperature')

% Add coastlines
hold on
plot(coast_lon, coast_lat, 'k')
hold off

其中，lon 和 lat 是经纬度网格，SST 是海温数据，coast_lon 和 coast_lat 是海岸线的经纬度。

旁观学习一下！