Hi ferreters,
i have a simple query regarding the use of LSL_lowpass filter as it is mentioned like this in the documentation LSL_LOWPASS(A, cutoff_period, filter_span).
where,
A is my monthly SST data from 1979-2014 i.e. 432 months, specification of A is given below
currently SET data sets:
1> ./
had_sst_anm_1979_2014.nc (default)
name title I J K L M N
SST_ANM SST_1979_2014-TEMP_CLI[GT=SST_1 1:290 1:120 ... 1:432 ... ...
i want to do filter for 7 years i.e. 84 months for decadal variability, so i am confused what should be the values i used for my cutoff_period and filter_span. For my analysis I used cutoff_period = 84 and filter_span = 85. Apart from this by using filter_span = 85 i am loosing 3 years data from beginning and Ending i.e. i am getting plot from 1982 to 2011 and when i am reducing the filter_span like 45, 25 and so on plot is reducing smoothness but the data loss is reducing i.e. i am getting values closer to 1979-2014. so kindly tell me what should be my filter_span to be used to get a good result.
regards
--
REGARDS
Saurabh Rathore
Research Scholar
(Earth System Sciences & Technology)Centre For Oceans, Rivers, Atmosphere & Land Science Technology
Indian Institute Of Technology, Kharagpur
contact :- 91- 8345984434