（注：本文仅为个人笔记）
多文件读写
fns = systemfunc(“ls /data/ACCESS_rlilp1_1/rcp45_???.nc”)
infile = addfiles(fns,“r”)
ListSetType(infile,“cat”) ;将所有年份rcp45资料整合到一个文件，维度不变
st = infile[:]->tos ;将整合好的文件中tos输出为st
单位改变
sst = st - 273.15 ;将K转变为C
sst!0 = “time” ;when doing simple calculation, build an array
sst&time = st&time
sst!1 = “lat”
sst&lat = st&latitude
sst!2 = “lon”
sst&lon = st&longitude
sst@units = “C”
sst@long_name = “sea surface temperature[C]”
Nino3.4
latS = -70.0
latN = 70.0
lonL = 30.0
lonR = 290.0
yrStrt = 2006
yrLast = 2100
yrClimStrt = 2010
yrClimLast = 2030
time = infile[:]->time
lat = infile[:]->latitude
lon = infile[:]->longitude
utc_date = cd_calendar(time,0)
YYYY = tointeger(utc_date(:,0))
istime = ind(YYYY.ge.yrStrt .and. YYYY.le.yrLast)
cltime = ind(YYYY.ge.yrClimStrt .and. YYYY.le.yrClimLast)
sst_selc = sst(istime , {latS:latN} , {lonL:lonR})
sst_clm = sst(cltime , {latS:latN} , {lonL:lonR})
sstClm = clmMonTLL(sst_clm) ;calculate monthly anomaly
ssta = calcMonAnomTLL (sst_selc, sstClm)
copy_VarCoords(sst_selc,ssta) ;copy coodinate to ssta
nino34 = dim_avg_n_Wrap(ssta(:,{-5:5},{190:240}),(/1,2/))
nino34_3 = runave(nino34,3,0)
存入txt
title = [/“nino34”,“nino34_3”/]
alist = [/nino34,nino34_3/]
write_table("/home/ACCESS1-3.txt",“w”,title,"%s,%s")
write_table("/home/ACCESS1-3.txt",“a”,title,"%8.4f,%8.4f")