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East Asia and Western Pacific METEOROLOGY AND CLIMATE

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YEAR<br />

1975<br />

1976<br />

1977<br />

1978<br />

1979<br />

1980<br />

1981<br />

1982<br />

1983<br />

1984<br />

1985<br />

1986<br />

1987<br />

1988<br />

1989<br />

Multiple regression analysis results<br />

(two parameters : DPIT,ELNN versus May-Oct rainfall)<br />

COEFFICIENT<br />

XI X2 CONST<br />

DPIT ELNN<br />

-68.4<br />

-68.4<br />

-68.7<br />

-69.0<br />

-71.4<br />

-71,4<br />

-79.5<br />

-85.8<br />

-85.2<br />

-81.9<br />

-78.5<br />

-74.5<br />

-75.9<br />

-65.7<br />

— 40 . 8<br />

167.5<br />

157.4<br />

162.4<br />

163.3<br />

152.7<br />

147. I<br />

151,2<br />

144.2<br />

136.7<br />

140.6<br />

138.1<br />

153.9<br />

139,5<br />

165.5<br />

194 . 8<br />

3241 .7<br />

3241 .0<br />

3271 .3<br />

3274 .5<br />

3306 .3<br />

3303 .0<br />

3460 . 7<br />

3586 .9<br />

3636 .0<br />

3542 .3<br />

3492 .7<br />

3368 . 5<br />

3406 .2<br />

3174, 1<br />

2628 . 4<br />

R<br />

FCST<br />

(o»n)<br />

.91 2570.3<br />

.92 1873.0<br />

.92 1604 .8<br />

.92 2290.3<br />

.87 2474.2<br />

.87 1631.4<br />

.90 1525.8<br />

.91 2062.7<br />

.84 2303.7<br />

.82 1627.7<br />

.81 2104.1<br />

.78 1950.4<br />

. 7 7 2193. 1<br />

.72 1802.2<br />

. 72<br />

ACT<br />

(mm)<br />

2464. 0<br />

2047. 9<br />

1592. 0<br />

2102. 0<br />

2242. 4<br />

1425. 9<br />

1354. 4<br />

2772. 0<br />

1970. 0<br />

1767. 0<br />

1564. 5<br />

1942. 8<br />

1716. 8<br />

1416. 9<br />

MEAN (ABSOLUTE)<br />

ST<strong>AND</strong>ARD DEVIATION<br />

ERROR ERROR<br />

(mm) (%)<br />

106. 3 4.3<br />

-174. 983 -8.5<br />

12. .8<br />

138. 9.0<br />

231. 8 10.3<br />

205. 5 14.4<br />

171. 4 12.7<br />

-709. 37 -25.6<br />

333. 16.9<br />

-139. 3 -7.9<br />

539. 6 34.5<br />

7. 6 .4<br />

476. 33 27.7<br />

385. 27.2<br />

0<br />

7<br />

263.<br />

197.<br />

Relative performance of all methods : both simple regression <strong>and</strong> multiple regression<br />

(verifying against the actual May to October totals in millimetres)<br />

YEAR DPIT A5NT A7NT 5Z40 7Z40 KSSH J5ZI M5HA M5HB ELNN MR4X MR3X MR2X<br />

1975 -469,,3<br />

-663 .9 -496 .5 -604.<br />

NA -361 .8 -658. 3 -402 .6 -930 .1 12 .4 6. 5 63 .4 106.8<br />

1976 -317,,0<br />

-472.9<br />

-216 .0 -313. 3 -235 .3 -86 .8 -310. 5 -202 .9 -492 . I 7 .8 -271 . 1-183<br />

.5 -174.9<br />

1977 19, ,4 -97 .6 358 .0 13. 8 49 . 7 224 .4 58. 4 304 .5 320 .2 309 .7 -26 .6 54 . 5 12.8<br />

1978 -98,,1<br />

--530 .1 -167 ,2 -111. 57 -34 , 7 -433 .2 -141. 5 -375 .8 -309 . 7 115 . 5 55 .6 131 .0 188.3<br />

1979 88, .3 -376 . 7 250 .7 -5 . -60 . 7 63 .0 -93. 4 11 .4 -180 .8 -64 , 7 464 .2 325 .4 231.8<br />

1980 204, ,5 510 .7 458 .4 471. 3 476 .1 503 .6 467. 8 472 .3 516 . 5 544 .8 326 .2 203 .8 205.5<br />

1981 84 .3 298 .6 558 .6 354. 0 397 .0 282 .9 423. 0 322 .8 412 .5 672 .6 135 .2 163 .8 171.4<br />

1982 -808 .0 -698 .8 -453 .8 -759. 0 -771 . 1-871<br />

.6 -750. 37 -965 .8 -913 .4 -723 .8 -734 .0 -656 . 5 -709.3<br />

1983 439, .2 565 .6 626 .2 45. 2 122 .3 135 .0 -10. 264 .4 -50 .3 -38 .3 249 . 5 246 .6 333.7<br />

1984 -59 .1 91 .2 234 .0 -411. 3- -316 .5 -392 .1 -288. 2 -81 .0 86 .5 174 .6 47 .9 45 .5 -139.3<br />

1985 -639,.7<br />

407 .7 284 .4 430. 535 484 .2 343 .2 375. 4 329 .6 3-72 .3 378 .3 342 .8 334 .0 539.6<br />

1986 -114 .8 48 .2 -224 .0 -74. -11 .2 -255 .1 34. 815 -280 . 1 -140 ,0 191 .9 85 .1 86 .2 7.6<br />

1987 641 .5 710 .3 661 .6 705. 788 .8 154 .7 720. 428 .5 401 .-8 132 .3 683 .2 696 .0 476.3<br />

1988 690 .1 1012 .9 305 .4 685. 8 740 . 1 595 .4 858. 892 .9 529 .4 234 . 5 240 .8 277 . 5 385.3<br />

MEAN(ABS. ) 333.8<br />

463 .2 378 .2 356. 1 345 .2 335 .9 370. 8 381 .0 404 .0 257 .2 262 .4 247 . 7 263.0<br />

STD(ABS, ) 265. 5 261 .6 157 .4 261. 1 279 .0 211 .7 277. 6 254 .8 258 .4 230 .6 225 .7 197 . 7 195.4

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