以前认为很麻烦的事往往一行命令就能搞定，代码如下

figure('position',[100 100 600 500],'PaperPositionMode', 'auto')

m_proj('Satellite','radius',10,'lat',21.13,'long',150,'rot',0)

        ax = subplot('position',[0.1 0.14 0.8 0.84]); hold on;

        colormap(GMT_wysiwygcont)

        caxis(ax,[-20 20]);

        m_coast('patch','k','edgecolor','none');

        fig = m_pcolor(lon,lat,sla_temp'.*100);

        set(fig,'linestyle','none')

        m_grid('xtick',[],'ytick',[],'linestyle','none','color','none','BackgroundColor', [0.7 0.7 0.7]); %此处修改

        ch = colorbar('horizontal');

        set(get(ch,'title'),'string',[num2str(year),ncfilename(29:30),ncfilename(31:32),'  unit:cm']);

修改前海表面高度异常SLA，北极地区都是白色与数据内容相冲，修改后变为灰色如图所示