<p>Country boundaries for Russia, Mongolia, and northeast China are shown on the map. It is plotted by the NOAA/ESRL Physical Science Division, Boulder Colorado (<a href="http://www.esrl.noaa.gov" target="_blank">http://www.esrl.noaa.gov</a>). Letters on the map represent different tree-ring sampling sites: <b>A</b> – Zhigansk, <b>B</b> –Khotugn, <b>C</b> – Tschita, <b>D</b> – Taksimo, <b>E</b> – Mangui, <b>F</b> – Mengkeshan. Triangles, circles, and squares represent sampling sites, PDSI points, and weather stations, respectively. Differents colors represent different correlation coefficients marked as the legend at the bottom of the map. The figure on a contour represents the correlation coefficient of this contour.</p
