chapter18

4 nc c g e

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: mp;*($ 81(%11($ ,*&(7*--%$ #4*#$ ?,+0*&-+.$ 71,$ 81,+$ #4*($ * 8*,T+.$.+)*.*-/%)*-+$0*,&*!&-&#B$!+71,[email protected]<K%2 )+(#",B$ ?,&1,$ #1$ *!1"#$ @RZX$ 4*%$ C+*T+(+.$ %"!%#*(#&*--B$ %&()+ O4+,+$&%$1#4+,$+0&.+()+$#4*#$)4*('+%$&($#4+$6%&*($81(%11($ #4+($ 9a"8*,$ +#$ *-2>$ @RRRW$ a,&%4(*8",#4B$ *(.$ Q1%C*8& 1))",,+.$*!1"#$#4+$#&[email protected][@RZZ$)-&8*#+$%4&7#$9\*('>$ JKKKW$ 5*,T*,$ +#$ *-2>$ JKK<=>$ &(01-0&('$ -*,'+/%)*-+$ )4*('+%$ &( Figure 18.x Global map of the Palmer Drought Index for 1900 to 2002. The Palmer index is JKK@=$*-1('$C&#4$)4*('+%$&($DE5F$9V"*('$+#$*-2>$JKK;W$]&*($. The PD*#81%?4+,&)$x)&,)"-*#&1(2$ 54&7#%$ &($ #4+$ \*-T+,$ N&,)"-*#&1($ *(. FAQ 3.2, Figure 1. The most important spatial pattern (top) of the monthly Palmer Drought Severity Index (PDSI) for 1900 to 2002 SI is a prominent inde of drought and measures the+#$ ulaivpdJKK;=>$e*(.$l mean conditiocumulatid ?,+)&?&#*#&1($ng previo+0&.+(#$n anmean sconditions.oThe bottom*??+*,$ #1$ !+$ )1"(#+,&('$ +77+)#% cum *-2>$ rominentloindex of ns)&($urface lan ve isdeficitrprelative sto clocal d e+(4*()+.$ r-*(./%+*$ )1(#,*%#%$ panel at e eficit (relativ to ca .+)-&(+%$ in s -*(.$ mo ture by inco orati *,+$ u pre ipitatio stimate of moistu e drawn int the atmosphere (based on atmospheric temperatures) into a hydrological accounting system. The lower panel shows how the sign and strength of this pattern has changed since 17$ e lower p t are positiv (nega1900. Red and ora&($ arsas are drier (howththeersign b%18+$e+M#+(#>$ wetterthis than average when th9%++$ shown in thsincelo1900. eThe smooth curve nge %1"#4+,($6%&*$n*(.>$ #1$ andd strength &($ 51"#4+*%#$6%&*$ e values e hows wetter) a av age and lue an gr en areas are of (drier) pattern has changed &(),+*%+.$ D-$ E&am...
View Full Document

This document was uploaded on 11/21/2013.

Ask a homework question - tutors are online