DIANA HERTANTI DATA AND INFORMATION STAFF OF CLIMATOLOGICAL BOGOR STATION

Introduction Bogor is located approximately 65 km south of Jakarta. Mostly of Bogor region is a non-zone seasons. That means there is no clear boundary between the dry season and rainy season. Bogor Climatological Station is located around 65 km south Jakarta, at E and S and located at an altitude of 207 meters above the sea level Bogor Climatological Station founded in 1959 as rainfall post

Background This research is to find determine how many changes that occurred at climate indices and determined its trend This research using precipitation and max min temperature data of Bogor climatology station since 1975 until 2011 Those data runs on Rclimdex 1.0.0

Temperature indices Txx (Max Tmax -Monthly maximum value of daily maximum temp)

Temperature indices Txn (Min Tmax -Monthly minimum value of daily maximum temp)

Temperature indices Tnx (Max Tmin -Monthly maximum value of daily minimum temp)

Temperature indices Tnn (Min Tmin -Monthly minimum value of daily minimum temp)

Temperature indices Tx10p (Cool nights -Percentage of days when TN<10th percentile)

Temperature indices Tx90p (Warm days- Percentage of days when TX>90th percentile)

Temperature indices Tn10p (Cool nights-Percentage of days when TN<10th percentile)

Temperature indices Tn90p(Warm nights- Percentage of days when TN>90th percentile)

Temperature indices Wsdi (Warm spell duration indicator - Annual count of days with at least 6 consecutive days when TX>90th percentile

Temperature indices Csdi (Cold spell duration indicator-Annual count of days with at least 6 consecutive days when TN<10th percentile)

Temperature indices Dtr(Diurnal temperature range-Monthly mean difference between TX and TN)

Precipitation indices Rx1day (Max 1-day precipitation amount- Monthly maximum 1-day precipitation)

Precipitation indices Rx5day (Max 5-day precipitation amount- Monthly maximum consecutive 5-day precipitation)

Precipitation indices Sdii (Simple daily intensity index- Annual total precipitation divided by the number of wet days (defined as PRCP>=1.0mm) in the year)

Precipitation indices R10mm (Number of heavy precipitation days-Annual count of days when PRCP>=10mm)

Precipitation indices R20mm (Number of very heavy precipitation days- Annual count of days when PRCP>=20mm)

Precipitation indices R25mm (Number of very heavy precipitation days- Annual count of days when PRCP>=25mm)

Precipitation indices Cdd (Consecutive dry days- Maximum number of consecutive days with RR<1mm)

Precipitation indices Cwd (Consecutive wet days- Maximum number of consecutive days with RR>=1mm)

Precipitation indices R95p (Very wet days- Annual total PRCP when RR>95 th percentile)

Precipitation indices R99p (Extremely wet days- Annual total PRCP when RR>99 th percentile)

Precipitation indices Prcptot (Annual total wet-day precipitation- Annual total PRCP in wet days (RR>=1mm))

Trend Table of Darmaga’s Data IndicesSYearEYearSlopeSTD_of_SlopeP_Value txx txn tnx tnn tx10p tx90p tn10p tn90p wsdi csdi dtr rx1day rx5day sdii r10mm r20mm R25mm cdd cwd r95p r99p prcptot

Conclusion As non seasonal zone, Bogor (represented by Bogor Climatology Station’s data) has significant changing only on several indices (tnx, tnn, tx10p, tn10p, tn90p, csdi, dtr, r20mm) that has p-value < 0.05 with varied slope value And for the other data, has not significant changing with varied slope value.