Table S1. Weekly isotopic compositions in precipitation and precipitation amount on Okinawa Island Sampling start date (Y/M/D) Sampling end date (Y/M/D) Precipitation (mm) d17O (permil vs VSMOW) d18O(permil vs VSMOW) dD(permil vs VSMOW) 17O-excess (per meg) 2011/1/4 2011/1/11 4.0 -0.8628 -1.7082 9.2899 40 2011/1/11 2011/1/17 29.6 -1.6408 -3.1712 0.2389 35 2011/1/17 2011/1/24 13.2 -1.7676 -3.4245 -6.6410 42 2011/1/24 2011/1/31 53.4 -1.6065 -3.1083 0.6539 36 2011/1/31 2011/2/7 67.8 -1.4519 -2.8069 -1.5968 31 2011/2/7 2011/2/14 45.9 -1.7005 -3.2638 -7.9377 24 2011/2/14 2011/2/21 23.4 -1.8876 -3.6417 -7.0296 37 2011/2/21 2011/2/28 21.6 -0.5277 -1.0488 6.2368 26 2011/2/28 2011/3/7 19.4 -2.1614 -4.1646 -13.0512 40 2011/3/7 2011/3/14 7.0 -1.0911 -2.1369 2.2360 38 2011/3/14 2011/3/22 3.9 -1.2570 -2.4202 -5.9113 22 2011/3/22 2011/4/11 2.3 -0.9833 -1.9141 2.7203 28 2011/4/11 2011/4/18 9.8 -0.9340 -1.8002 -1.4786 17 2011/4/18 2011/4/25 15.4 -2.0062 -3.8610 -14.2942 34 2011/4/25 2011/5/2 72.6 -2.4720 -4.7459 -29.9910 37 2011/5/2 2011/5/9 42.2 -2.2463 -4.2858 -25.3676 19 2011/5/9 2011/5/16 74.3 -2.6104 -4.9568 -30.4512 10 2011/5/16 2011/5/23 98.7 -2.8279 -5.3892 -32.5031 21 2011/5/23 2011/5/30 74.0 -2.7906 -5.3025 -33.0804 13 2011/5/30 2011/6/6 161.2 -3.9368 -7.4906 -49.1145 25 2011/6/6 2011/6/20 2.7 -0.7730 -1.4930 -3.8545 16 2011/6/20 2011/6/27 97.9 -4.6482 -8.8008 -62.7425 8 2011/6/27 2011/7/4 5.2 -2.1422 -4.1073 -22.5347 29 2011/7/4 2011/7/11 12.2 -4.0366 -7.6684 -52.0412 20 2011/7/11 2011/7/19 28.2 -3.8649 -7.3248 -48.1245 9 2011/7/19 2011/7/25 20.4 -3.4108 -6.4906 -43.6200 22 2011/7/25 2011/8/1 12.4 -2.8615 -5.4565 -33.7296 23 2011/8/1 2011/8/8 449.0 -4.6101 -8.7323 -62.6469 10 2011/8/8 2011/8/22 1.3 -1.2163 -2.3300 -8.3915 15 2011/8/22 2011/8/29 22.2 -2.4332 -4.6275 -27.9346 13 2011/8/29 2011/9/12 3.7 -1.6646 -3.1854 -11.7146 19 2011/9/12 2011/9/20 39.7 -2.2120 -4.2192 -27.4138 18 2011/9/20 2011/9/26 2.0 -1.1838 -2.2591 -5.7097 10 2011/9/26 2011/10/3 4.3 -1.4080 -2.7103 -6.3992 24 2011/10/3 2011/10/6 115.2 -2.3978 -4.5696 -24.1827 18 2011/10/6 2011/10/11 103.1 -3.0627 -5.8488 -35.0015 30 2011/10/11 2011/10/17 47.4 -3.9237 -7.4648 -50.8995 25 2011/10/17 2011/10/24 2.9 -2.9207 -5.5444 -36.7921 11 2011/10/24 2011/11/7 100.4 -1.9773 -3.7841 -19.2722 23 2011/11/7 2011/11/14 186.0 -2.6080 -4.9931 -26.6433 32 2011/11/14 2011/11/21 33.5 -2.8302 -5.4024 -31.6873 26 2011/11/21 2011/11/28 18.4 -3.8893 -7.4101 -50.5642 30 2011/11/28 2011/12/5 45.7 -4.8485 -9.2325 -64.8834 37 2011/12/5 2011/12/12 23.0 -2.0211 -3.8941 -12.7520 37 2011/12/12 2011/12/19 36.9 -1.7874 -3.4414 -2.2158 31 2011/12/19 2011/12/26 21.1 -1.6220 -3.1251 -3.4032 29 2011/12/26 2012/1/4 8.2 -1.5155 -2.9397 5.2700 38 2012/1/4 2012/1/10 31.7 -1.4725 -2.8555 0.7066 36 2012/1/10 2012/1/16 37.2 -2.5415 -4.8464 -20.4481 20 2012/1/16 2012/1/23 28.4 -1.8396 -3.5509 -11.0158 37 2012/1/23 2012/1/30 46.9 -1.9779 -3.8169 -5.0022 39 2012/1/30 2012/2/6 7.9 -1.9846 -3.8415 -7.2428 46 2012/2/6 2012/2/13 14.5 -2.3434 -4.4854 -19.4326 27 2012/2/13 2012/2/20 6.8 -1.6377 -3.1389 -10.2452 21 2012/2/20 2012/2/27 81.6 -3.9830 -7.5693 -47.7713 21 2012/2/27 2012/3/5 48.6 -1.3923 -2.6983 -7.1347 33 2012/3/5 2012/3/12 35.3 -1.0859 -2.1178 -3.7402 33 2012/3/12 2012/3/19 16.4 -1.0132 -2.0030 9.8830 45 2012/3/19 2012/3/26 19.4 -1.7380 -3.3440 -10.8941 29 2012/3/26 2012/4/2 5.7 -1.8914 -3.6338 -10.2403 29 2012/4/2 2012/4/9 4.5 -0.8720 -1.6893 1.2578 20 2012/4/9 2012/4/16 61.1 -1.6995 -3.2851 -14.8893 36 2012/4/16 2012/4/23 220.0 -2.5605 -4.9062 -26.6406 33 2012/4/23 2012/5/2 98.4 -2.1060 -4.0129 -20.6647 15 2012/5/2 2012/5/7 26.2 -3.3126 -6.2849 -37.5767 11 2012/5/7 2012/5/14 26.7 -1.1640 -2.2720 -4.1698 36 2012/5/14 2012/5/21 148.1 -4.7506 -9.0277 -60.5024 26 2012/5/21 2012/5/28 3.0 -1.4397 -2.7897 -13.8295 34 2012/5/28 2012/6/4 48.7 -3.9348 -7.4948 -48.9365 30 2012/6/4 2012/6/11 33.9 -3.7546 -7.1265 -48.7642 15 2012/6/11 2012/6/18 131.9 -3.1390 -5.9480 -40.6157 6 2012/6/18 2012/6/25 155.4 -4.4773 -8.5047 -58.2278 22 2012/6/25 2012/7/2 5.0 -2.0566 -3.9379 -23.7876 25 2012/7/2 2012/7/9 31.4 -4.8284 -9.1626 -59.7501 20 2012/7/9 2012/7/17 16.6 -3.4891 -6.6047 -44.9014 4 2012/7/17 2012/7/23 19.9 -2.9271 -5.5588 -35.0790 12 2012/7/23 2012/7/30 4.5 -2.1813 -4.1642 -23.3288 20 2012/7/30 2012/8/6 305.0 -4.6606 -8.8371 -62.0512 15 2012/8/6 2012/8/13 52.2 -2.3429 -4.4578 -28.1354 13 2012/8/13 2012/8/17 17.2 -2.9410 -5.5796 -35.8114 9 2012/8/17 2012/8/24 32.9 -3.4725 -6.6043 -42.9801 20 2012/8/24 2012/8/28 274.0 -4.1893 -7.9369 -54.6885 9 2012/8/28 2012/9/3 3.8 -2.0874 -3.9900 -24.5138 21 2012/9/3 2012/9/10 12.8 -1.8911 -3.6322 -17.4358 28 2012/9/10 2012/9/18 161.0 -4.3945 -8.3463 -56.7834 21 2012/9/18 2012/9/14 40.1 -2.0532 -3.9316 -12.1197 25 2012/9/14 2012/10/1 84.4 -3.5486 -6.7229 -44.8064 7 2012/10/1 2012/10/22 87.8 -5.2159 -9.8829 -72.8362 15 2012/10/22 2012/11/5 97.4 -3.0187 -5.7788 -27.2890 37 2012/11/5 2012/11/12 32.3 -3.0258 -5.7631 -30.5628 21 2012/11/12 2012/11/19 21.6 -3.6068 -6.8859 -40.1615 35 2012/11/19 2012/11/26 19.0 -2.6292 -5.0293 -26.5245 30 2012/11/26 2012/12/3 130.8 -2.9589 -5.6870 -27.4023 48 2012/12/3 2012/12/10 45.4 -3.5800 -6.8716 -31.1656 54 2012/12/10 2012/12/25 3.7 -1.3737 -2.6633 0.6812 33