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APPENDICES

Chronologies Used and Their Statistics for the April-August PDSI Reconstruction

Site / Lat. (°E) / Long. (°N) / Speciesa / Full Period / No. of Series / Median Length / EPS (Tree)b / EPS >0.85c / Yr EPS >0.85d / Chron. Typee
Bugant / 49.41 / 107.57 / PISY / 1730-2008 / 34 / 210 / 0.970 / 1815 / 1793 / ARS
Dadal / 49.01 / 111.59 / PISY / 1704-2001 / 22 / 259 / 0.968 / 1735 / 1716 / STD
Dulaan Khan Nars / 49.94 / 106.20 / PISY / 1653-2008 / 44 / 281 / 0.981 / 1675 / - / STD
Inferno Ridge / 48.83 / 111.67 / PISI / 1692-1996 / 35 / 175 / 0.980 / 1750 / - / ARS
Manzshir Hiid / 47.77 / 107.00 / PISI / 1505-1994 / 25 / 183 / 0.985 / - / 1787 / ARS
Narstain Davaa / 48.37 / 106.18 / PISY / 1740-2008 / 20 / 181 / 0.972 / - / 1802 / ARS
Onon Gol / 48.83 / 111.69 / LASI / 1576-2001 / 25 / 201 / 0.952 / 1680 / - / ARS
Orkhon Gol Hurshee / 46.79 / 101.95 / LASI / 1503-2009 / 27 / 290 / 0.966 / 1585 / - / STD
Shaamar Mahan Nars / 50.25 / 106.18 / PISY / 1770-2008 / 17 / 208 / 0.965 / - / 1786 / ARS
Terelj / 47.96 / 107.46 / LASI / 1590-2002 / 28 / 288 / 0.980 / - / 1622 / STD
Tujin Nars / 50.15 / 106.37 / PISY / 1731-2008 / 18 / 169 / 0.897 / 1815 / - / ARS
Uglugchiin Herem / 48.41 / 110.20 / PISY / 1705-2009 / 16 / 171 / 0.924 / 1770 / - / ARS
Urgun Nars / 48.58 / 110.55 / PISY / 1651-1996 / 33 / 189 / 0.984 / - / 1664 / STD
Zurkh Uul / 48.65 / 106.03 / PISY / 1714-2009 / 22 / 192 / 0.971 / - / 1737 / STD
Zuun Mod / 47.78 / 107.50 / LASI / 1582-2001 / 51 / 332 / 0.993 / - / 1582 / STD

a PISI, Pinus sibirica; PISY, Pinus sylvestris; LASI, Larix sibirica

b = between tree EPS; c = segment where between-tree EPS >0.85; [EPS = expressed population signal]

d = year when between-tree EPS >0.85 if earlier than b

e ARS = ARSTAN chronology; STD = Standard chronology

Regional tree-ring chronologies were obtained from the International Tree-Ring Data Bank (ITRDB) maintained by the National Oceanic and Atmospheric Administration’s (NOAA) World Data Center for Paleoclimatology (Mongolian American Tree-Ring Project and unpublished data).