Hydrometeorology

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Hydrometeorology is a branch of meteorology and hydrology that studies the transfer of water and energy between the land surface and the lower atmosphere for academic research, commercial gain or operational forecasting purposes.

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Whilst traditionally meteorologists and hydrologists sit within separate organisations, hydrometeorlogists may work in joint project teams, virtual teams, deal with specific incidents or be permanently co-located to deliver specific objectives. Hydrometeorlogists typically have a foundation in one or other discipline before undertaking additional training and specialist forecaster training depending on requirements. The cross over skills and knowledge between the two disciplines can bring organisational benefits in terms of efficiencies in terms of using tools and data available, and provide benefits in terms of enhanced lead times ahead of hydrometeological hazards occurring.

UNESCO has several programs and activities in place that deal with the study of natural hazards of hydrometeorological origin and the mitigation of their effects. [1] Among these hazards are the results of natural processes and atmospheric, hydrological, or oceanographic phenomena such as floods, tropical cyclones, drought, and desertification. Many countries have established an operational hydrometeorological capability to assist with forecasting, warning, and informing the public of these developing hazards.

Hydrometeorological forecasting

One of the more significant aspects of hydrometeorology involves predictions about and attempts to mitigate the effects of high precipitation events. [2] There are three primary ways to model meteorological phenomena in weather forecasting, including nowcasting, numerical weather prediction, and statistical techniques. [3] Nowcasting is good for predicting events a few hours out, utilizing observations and live radar data to combine them with numerical weather prediction models. [3] The primary technique used to forecast weather, numerical weather prediction uses mathematical models to account for the atmosphere, ocean, and many other variables when producing forecasts. [3] These forecasts are generally used to predict events days or weeks out. [3] Finally, statistical techniques use regressions and other statistical methods to create long-term projections that go out weeks and months at a time. [3] These models allow scientists to visualize how a multitude of different variables interact with one another, and they illustrate one grand picture of how the Earth's climate interacts with itself. [4]

Risk assessment

A major component of hydrometeorology is mitigating the risk associated with flooding and other hydrological threats. First, there has to be knowledge of the possible hydrological threats that are expected within a specific region. [3] After analyzing the possible threats, warning systems are put in place to quickly alert people and communicate to them the identity and magnitude of the threat. [3] Many nations have their own specific regional hydrometeorological centers that communicate threats to the public. Finally, there must be proper response protocols in place to protect the public during a dangerous event. [3]

Operational hydrometeorology in practice

Rainfall forecasts for the 1909 Velasco hurricane produced by the US Hydrometeorological Prediction Center (now the Weather Prediction Center) 1932 Velasco hurricane rainfall totals.png
Rainfall forecasts for the 1909 Velasco hurricane produced by the US Hydrometeorological Prediction Center (now the Weather Prediction Center)

Countries with a current operational hydrometeorological service include, among others:

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<span class="mw-page-title-main">Weather Prediction Center</span> United States weather agency

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The flash flood guidance system (FFGS) was designed and developed by the Hydrologic Research Center, a non-profit public-benefit corporation located in San Diego, CA, US, for use by meteorological and hydrologic forecasters throughout the world. The primary purpose of the FFGS is to provide operational forecasters and disaster management agencies with real-time information pertaining to the threat of small-scale flash flooding throughout a specified region.

The North American Ensemble Forecast System (NAEFS) is a joint project involving the Meteorological Service of Canada (MSC) in Canada, the National Weather Service (NWS) in the United States, and the National Meteorological Service of Mexico (NMSM) in Mexico providing numerical weather prediction ensemble guidance for the 1- to 16-day forecast period. The NAEFS combines the Canadian MSC and the US NWS global ensemble prediction systems, improving probabilistic operational guidance over what can be built from any individual country's ensemble. Model guidance from the NAEFS is incorporated into the forecasts of the respective national agencies.

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References

  1. ↑ "Hydro-meteorological hazards | United Nations Educational, Scientific and Cultural Organization". Unesco.org. Retrieved 2016-08-05.
  2. ↑ Dale, Murray; Davies, Paul; Harrison, Tim (2012). "Review of recent advances in UK operational hydrometeorology". Proceedings of the Institution of Civil Engineers - Water Management. 165 (2): 55–64. Bibcode:2012ICEWM.165...55D. doi:10.1680/wama.2012.165.2.55.
  3. 1 2 3 4 5 6 7 8 Sene, Kevin (2015). Hydrometeorology: Forecasting and Applications. Springer International Publishing Switzerland. p. 1. ISBN   978-3-319-23546-2.
  4. ↑ Betts, Alan (2004). "Understanding Hydrometeorology Using Global Models". Bulletin of the American Meteorological Society. 85 (11): 1673–1688. Bibcode:2004BAMS...85.1673B. doi: 10.1175/BAMS-85-11-1673 .
  5. ↑ "Centro Nacional de Monitoramento e Alertas de Desastres Naturais (Cemaden)". labhidro-IGEO-UFRJ. Retrieved 2017-06-29.
  6. ↑ "Flood Forecasting Centre". Ffc-environment-agency.metoffice.gov.uk. 2011-09-22. Retrieved 2014-05-28.
  7. ↑ "Information nationale". Vigicrues. Retrieved 2014-05-28.
  8. ↑ "Hydrometeorology and water management". Deutscher Wetterdienst. Retrieved 2021-11-20.
  9. ↑ "Hydro-Meteorology". Imd.gov.in. Archived from the original on 2014-06-30. Retrieved 2014-05-28.
  10. ↑ "Flood Forecasting Service". Sepa.org.uk. Retrieved 2014-05-28.
  11. ↑ "Republic Hydrometeorological service of Serbia Kneza Višeslava 66 Beograd". Hidmet.gov.rs. 2014-05-18. Retrieved 2014-05-28.
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