what is the SOI of darwin which nist data sets provide the southern oscillation index what is the soi what is southern oscillations where is the soi dataset from what is the source of soi data how to find soi data what is the enso data where is enso data how is nist soi data calculated? which data is the most accurate to use in determining atmospheric pressure? where do enso data come from what is the soi value what is enso data what data does nist use what is the source for enso data nist soi data what source is nist enso when does enso data come out what is the source for the southern oscillation