The eruption of Mount Anak Krakatau in the Sunda Strait has caused\nvolcanic ash to spread across several regions, including Banten, DKI\nJakarta, West Java, and Lampung. This condition not only disrupts\ncommunity activities but also impacts aviation, as volcanic ash can\nendanger aircraft operations.<\/p>\n
To help reduce the impact of this ash dispersal, the National\nDisaster Management Agency (BNPB) conducted Weather Modification\nOperations (OMC) on Sunday (6\/9). One of the techniques used is\nstimulating clouds to produce rain. If there is insufficient growth of\nrain clouds, the BNPB, together with the BMKG (Meteorology, Climatology,\nand Geophysical Agency), is also preparing a water mist method to help\nbreak down ash particles in the affected areas.<\/p>\n
These efforts have brought the term \u2018cloud seeding\u2019 back into the\nspotlight. This technology is often referred to as \u2018artificial rain\u2019,\nalthough humans cannot simply create rain from a clear sky.<\/p>\n
So, what is cloud seeding and how can this technology help trigger\nrainfall?<\/p>\n
What is cloud seeding?<\/strong><\/p>\n Cloud seeding is a cloud seeding technique aimed at influencing the\nprocess of rain formation within clouds. Simply put, this technology\nworks by introducing specific materials\u2014consisting of sodium chloride\n(NaCl)\/fine salt, urea, silver iodide, and even solid carbon\ndioxide\u2014into clouds that already possess the potential to produce rain.\nThese materials assist in the formation or growth of water droplets or\nice crystals, allowing them to increase in size and eventually fall to\nthe surface as rain.<\/p>\n Therefore, cloud seeding does not mean creating clouds from an empty\nsky. The presence of suitable clouds remains the primary requirement.\nWithout clouds containing sufficient water and supporting atmospheric\nconditions, seeding will not automatically result in rain.<\/p>\n How does cloud seeding work?<\/strong><\/p>\n The process begins with monitoring atmospheric conditions.\nMeteorological teams search for clouds with characteristics suitable for\nseeding. Once potential clouds are identified, aircraft can be used to\ntransport and disperse the seeding materials into the designated cloud\nareas.<\/p>\n These materials then assist physical processes within the clouds. In\ncertain clouds, seeding particles can serve as nuclei for water vapour\nto condense or assist in the formation of ice crystals. As this process\ncontinues, water droplets or ice crystals grow larger. Once their weight\nis sufficient to overcome the forces holding them within the cloud,\nthese particles fall to the surface as precipitation or rain.<\/p>\n Thus, the aircraft is not a \u2018rain-making machine\u2019. The aircraft\nmerely serves as a means to deliver seeding materials to clouds that\nmeet specific conditions.<\/p>\n What materials are used?<\/strong><\/p>\n The materials used in cloud seeding can vary depending on the type of\ncloud and the method applied. One commonly known material is hygroscopic\nparticles, such as salt, which can assist the growth of water droplets\nin warm clouds. In cloud systems involving freezing processes, specific\nmaterials can also be used to assist in the formation of ice crystals.\nThe selection of materials, quantity, timing, and seeding location is\nnot done randomly; everything is adjusted based on the analysis of\natmospheric conditions and the objectives of the operation.<\/p>\n Why can\u2019t all clouds be turned into rain?<\/strong><\/p>\n This is a common misunder<\/p>\n standing regarding the term \u2018artificial rain\u2019. Not all clouds can be\nseeded. The OMC team must find clouds with supporting conditions and\nthen determine when and where the seeding should take place. The\npresence of clouds alone is insufficient; temperature, humidity, wind,\nwater content, cloud development, and atmospheric dynamics must also be\ntaken into account. Consequently, OMC relies heavily on weather data and\nreal-time atmospheric monitoring. The BNPB has previously explained that\nOMC cannot be performed when the growth of rain clouds is insufficient.\nIn other words, if natural conditions are unfavourable, seeding cannot\nbe forced.<\/p>\n How is cloud seeding used for the Anak Krakatau\nash?<\/strong><\/p>\n In handling the eruption of Mount Anak Krakatau, the BNPB uses OMC as\nan effort to help wash away volcanic ash remaining in the atmosphere. If\nsuitable clouds are present, the team can perform seeding to stimulate\nrainfall. The falling rain is expected to help carry ash particles from\nthe atmosphere to the surface, thereby reducing their concentration in\nthe air.<\/p>\n The Head of BNPB, Suharyanto, explained that OMC is conducted by\nconsidering weather conditions and flight safety. This is crucial\nbecause the dispersal of volcanic ash from Anak Krakatau had previously\ndisrupted several airports. However, if rain clouds do not grow\nsufficiently, the BNPB has prepared an alternative approach using water\nmist. This technique aims to help break down dangerous ash particles in\naffected areas, including DKI Jakarta, Banten, and Lampung.<\/p>\n In Indonesia, weather modification has been used for various disaster\nmitigation needs. In addition to managing volcanic ash dispersal, OMC\ncan also be used to combat forest and land fires. The rain generated or\nenhanced in target areas can help moisten the land and reduce the dry\nconditions that support the spread of fire. The BNPB also uses OMC to\nmoisten peatlands as part of prevention efforts to ensure these areas do\nnot easily catch fire again. Under certain conditions, weather\nmodification can also be used to mitigate the risk of extreme rainfall\nby utilising existing clouds before the cloud system develops further or\nreaches the target mitigation area.<\/p>",
"url": "https:\/\/jawawa.id\/newsitem\/understanding-cloud-seeding-the-technology-used-to-trigger-rain-from-clouds-1789387679",
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