Although nowadays most of Indonesia is in a period of drought, but
extreme weather actually hit several regions in the country.
rainfall accompanied by strong winds has triggered the occurrence of
floods, landslides and lunge tornado in several areas should be dry due
to ongoing dry weather.
high rainfall during the dry season is a lot of benefit to many farmers
who experienced famine in the previous year due to drought, because of
the rain in this dry season of planting and harvesting them become more
in the dry season also provide many benefits such as adequacy of water
supply needs for communities in areas that normally experience water
shortages during the dry season. Although
it is recognized that these conditions would likely lead to large
losses for salt, and tobacco farmers, who expect the presence of plenty
of sun in summer.
La Nina PHENOMENON
violations that trigger the occurrence of climate extremes in dry
weather can not be separated from several factors such as rainfall
controlling overheating in sea surface temperatures in Indonesian
sea surface temperatures in the waters of Indonesia caused more
intensive process of evaporation and cloud formation that caused a lot
of rain. In
addition to sea surface temperature, extreme weather conditions in most
parts of Indonesia in recent years due to La Nina phenomenon of global
Nina causes buildup of air mass that contains a lot of water vapor in
the atmosphere of Indonesia, so the potential for rain cloud formation
becomes higher. As a result of the months in mid 2010 which should take
place now instead drought torrential rains in various areas.
Nina is a global natural phenomenon characterized by the condition of
sea surface temperatures in the equatorial Pacific Ocean waters under
normal values (cold), while sea surface temperature conditions in the
waters of Indonesian Maritime Continent was above normal values (warm).
La Nina phenomena can be known from the value of sea surface temperature
anomaly in the waters of the Pacific Ocean. La
Nina is the opposite of El Nino is a phenomenon of rising sea surface
temperatures in the Pacific Ocean waters that affects the occurrence of
long dry season and the length in Indonesia.
opposed to the natural phenomenon of El Nino, La Nina during the sea
surface temperature in the waters of the Pacific Ocean will become cold.
Cooling sea surface temperatures will lead to high air pressure.
territory which lies west of the Pacific will experience a low air
pressure caused by warming sea surface temperature in the vicinity. The
condition causes air masses from the Pacific will flow into Indonesia
that resulted in converging air masses rich in moisture, then the
chances of rain in the Indonesian area becomes larger. The trend was the
emergence of this phenomenon has been observed since the beginning of
the dry 2010.
prediction results Climatology Meteorology and Geophysics Agency (BMKG)
and several monitoring agencies such as NOAA weather world (USA), BOM
(Australia), Jamstec (Japan) showed the presence of negative sea surface
temperature anomaly. On
August until September 2010 been predicted La Nina phenomenon moderate,
while in October 2010 until January 2011 will be a strong La Nina
La Nina phenomenon has affected the weather
conditions in the atmosphere of Indonesia since early August 2010. When
that time most of Indonesia is entering the dry season, but the fact
still remains rain fell sporadically in various areas. Incidence of
drought is the case rain makes the dry period in 2010 dubbed a wet dry.
on data from monitoring results BMKG rainfall in various regions showed
that rainfall during July and August 2010 over 50 mm per day. This
means that almost most of Indonesia is experiencing rainfall with
Berasarkan wet dry note in Indonesia, the weather in 2010 is the most extreme conditions during the last 12 years. Monitoring
data in Indonesian waters, sea surface temperature indicate that the La
Nina in 2010 causing temperatures to most warm Indonesian waters during
the last 12 years. La Nina has caused climate impacts in the form of significant deviations.
phenomenon of overheating in sea surface temperature is almost uniform
in all regions of Indonesia is similar to the climate condition in 1998.
But when viewed in intensity, sea surface temperatures seem much higher in Indonesian waters. The
divergence of the current climate could be said unique because in
addition to the most extreme deviation, overheating in sea surface
temperatures in the waters of Indonesia take place evenly.
associated with La Nina, then the prediction BMKG indicate that extreme
weather will still take place and hit the majority of the Indonesian
territory until the end of this year. This
prediction is based on the data of sea surface temperature Indonesian
waters would continue to warm up to the moon in December 2010. Meanwhile
predicted La Nina phenomenon will continue to dominant until March 2011
onwards towards neutral conditions in April 2011.
predictions are based on data and scientific facts mentioned above, all
the more affirming a conclusion about the presence of La Nina this
year, so every effort in to face the impact of the presence of La Nina
weather extremes need to be prepared as early as possible. Public urged
to improve disaster preparedness in the face of extreme weather impacts
that may occur in the region occurred .***