Cempaka, Dahlia, Then What

Cempaka, Dahlia, Then What

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Through the current Cempaka and Dahlia SIklon, it seems that God is about to rebuke us. If through these two cyclones we do not take the lesson, it is very useless to pass by these two cyclones. Through this paper, let's see what a tropical cyclone is, how climate change can cause it, and what we can actually do.

Cempaka tropical cyclone is declared weakened. However, there is a new tropical cyclone, Dahlia. The appearance of this Dahlia is warned by BMKG through its official website accompanied by extreme weather warnings on the west coast of Sumatra to the southern coast of Java. [I] This warning is valid until several days into the future.

The effects of tropical cyclones are very much felt by us, especially the inhabitants of Java Island. In the last few days, the weather seemed uncertain. The rain accompanied by strong winds hit, but not long ago he then subsided.

Tropical cyclone (tropical cyclone) is a cyclone formed from warm weather in tropical waters, generally causing intense rainfall and strong winds [ii]. Tropical cyclones can form, either within a day to several weeks. [Iii] Tropical cyclone formation is generally in five supporting conditions:

The average temperature of sea level is more than 26.5-27 oC, to a depth of at least 50 m
The inner layer of the sea is in an unstable condition
There are cyclone seeds on the surface of the earth that continues to grow larger
High humidity conditions, up to at least a height of 5 km
The vertical wind blows slowly, allowing for the formation of a vortex
Being at least 500 km from the equator, but within a radius it is still possible, albeit a small chance. [Iv]

Tropical cyclones in Indonesia are rare. Therefore, Indonesia is on the territory traversed by the equator. The latitude of Indonesia also ranges from 60LU – 110LS. In Java, the most frequent occurrence of tropical cyclones was in February, with 122 (23%) incidents during 42 years of observation (1964-2005). Meanwhile, November was only 5% and December was 14%. [V] That is, the greatest risk of tropical cyclone occurrence is in February, although it is not possible to occur in other months.

Climate change

The occurrence of tropical cyclones Cempaka and Dahlia in the near enough time is actually enough to be an alarm for us. That, climate change has taken place before our eyes. Although tropical cyclones are a common natural occurrence, the increased intensity and frequency of occurrences make us wary.

One of the impacts of climate change is the increasing frequency of meteorological disasters, such as tropical cyclones.

Climate change is mainly caused by global warming. Global warming is caused by the accumulation of greenhouse gases in the atmosphere. As the temperature of the earth increases, the sea temperature will increase. As sea temperatures increase, the polar glacier water can continue to melt. As the glacier melts continuously, there is an increase in sea level.

Global warming is contributed by human activity. The use of large amounts of fossil energy contributes to CO2 gas, agricultural activities and livestock contributes to methane gas, industrial activity also produces a variety of pollutants. Of the many human activities that cause climate change, 90% of them contribute to warming the ocean. [Vi] This is due to the ability of the oceans to store heat better than the atmosphere or land.The stored heat of global warming in the oceans makes environmental impacts. Starting from the whitening of coral reefs to extinction of some species that are not able to adapt. Not only that, for the climate, rising ocean heat means the climate will be disrupted.

Why is that?

The oceans are the keepers of the earth's temperature, with the existence of the Termohaline Circulation, which is the circulation that is affected by the temperature and the salt content of seawater. As sea temperatures rise dramatically, the result is the disruption of this circulation. The weather becomes more and more uncertain, and in a certain period of time will change the cycle in the climate.

As the sea surface temperature rises, it will become the center of low air pressure. If the temperature is maintained in conditions long enough and in the deep ocean was warmed up, the center of low air pressure will be the destination of the wind. When a lot of wind that leads to the place, it will allow the formation of cyclone seeds. Therefore, as the temperature of the earth continues to increase, the potential for tropical cyclones will increase. A study says, even if the number of hits (tropical cyclones present in the Atlantic region) does not increase, but large-scale tropical cyclones are on the rise. [Vii]

The risk of climate change for us is not just the growing intensity of tropical cyclones we are currently experiencing. Climate change also led to El Nino and La Nina becoming more frequent. In Indonesia, the El Nino phenomenon will have an impact on forest fires. Indeed, forest fires in Indonesia are caused by industrialists who burn land. However, in the presence of El Nino, the fire will become more severe due to the hot temperatures and dry air.

Then, What can we do?

This is the essence of this writing. If we already feel the uncertain weather in tropical cyclones Cempaka and Dahlia, then what? Do we condemn the rain? Or do we blame the situation? Certainly not!

Solutions to this climate problem we can see from two sides, namely macro and micro. In macro terms, solutions to climate problems are a worldwide responsibility. Therefore, this one earth is inhabited by all human beings. Therefore, a common solution is required from the countries of the world.

Awareness of climate change in the world began to take shape in 1972 when the Stockholm Declaration was adopted in 1972. Next came various world organizations dealing with climate issues. UNEP, UNFCCC, IPCC, Rio 1992 Conference, Kyoto Protocol 1997, to the latest is COP 23 in Bonn, Germany.

Unfortunately, this global climate-rescue effort is through many obstacles. Major countries such as the United States (which is also the largest greenhouse gas contributor) have retreated from the COP 21 two years ago under Donald Trump. In fact, in COP 21 it has been a joint commitment to withstand the rate of temperature rise to not exceed 20C since the Industrial Revolution. [Viii]

Not only at the international level, at the national level, there must be an effort to save the climate. In Indonesia for example, there needs to be a shift in the use of power plants to renewable energy such as solar cells. The problem is, in the current government electricity project, the use of coal energy is still the main focus. In addition, it is also necessary to enforce regulations for the industry so as not to dispose of polluting waste. Do not get, as one environmentalist once said, that the aspect of legality is just a legalization of pollution practices, rather than preventing pollution itself.In a micro, awareness to stop climate change can be done by anyone. Starting from the reduction of the use of motor vehicles, plastics, using the principle of recycling of goods, and buy environmentally friendly products. Although, it appears also criticism that not to awareness of environmental protection even capitalized by the owners of capital so that environmentally friendly products is just a stamp.

Is there hope?

Surely that hope keeps burning, as we want to work together to stop, or at least reduce, this climate change. If humans are the cause of climate change, then humans are also responsible for fixing it.

Do not let, we just issue a solution that is not solutif, just because follow-trends only. As Al Gore once said in his latest film, An Inconvenient Sequel: Truth to Power,

"Do not let anybody tell you that we're gonna get on rocket ships and go to Mars and live in hermetically sealed buildings. (…) THIS IS OUR HOME!"

"Do not let someone tell you that we're going to fly rocket to Mars and live inside a locked building, THIS IS OUR HOME!"

[i] "Cempaka Meluruh, Tropical Cyclone Dahlia Born, Beware Hydrometeorology Facing Disaster", BMKG, accessed on 30 November 2017,

[ii] See Alan Strahler, Introducing Physical Geography 5th ed., (New Jersey: John Wiley & Sons, 2011), p. 610; C. Donald Ahrens, Essentials of Meteorology: An Invitation to the Atmosphere 6th ed., (Belmont: Cengage Learning, 2012), p. 489

[iii] Jeffrey D. Keppert, "Tropical Cyclone Structure and Dynamics", in Global Perspective on Tropical Cyclone: ??From Science to Mitigation, ed: Johnny C. L. Chan and Jeffrey D. Keppert, (Singapore: World Scientific, 2010), p. 4

[iv] See Keppert (2010), p. 56 and "The Process of Tropical Cyclones", BMKG, accessed on 30 November 2017,

[v] "Cyclone Season Around Indonesia", BMKG, accessed on 30 November 2017,[vi] Joseph Romm, Climate Change: What Everyone Need To Know. (Oxford: Oxford University Press, 2016), p. 6

[vii] Ibid, p. 59

[viii] "Early Warning to Prevent Earth Disaster", Kompas, 2 November 2017

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