MONITORING OF HYDROMETEOROLOGICAL CONDITIONS AT THE LEGMC - Zemnieku saeima

MONITORING OF
HYDROMETEOROLOGICAL
CONDITIONS AT THE LEGMC

          Svetlana Aniskevica – Head of Climate And Methodological Division
                                               svetlana.aniskevica@lvgmc.lv
             Laura Krumina – Head of Hydrometeorological Forecast Division
                                                    laura.krumina@lvgmc.lv
                 Latvian Environment, Geology and Meteorology Centre
                                                    RIGA, 11.09.2018

Extreme weather

            2017 year flood                    2018 year drought

                                            Precipitation amount anomaly in May 2018

Precipitation amount anomaly in 3rd
       decade of August 2017

                                              Temperature anomaly in May 2018

LEGMC
Latvian Environment, Geology and Meteorology Centre (LEGMC) –
National Hydrometeorological and Climate Data Service
• The 1st regular hydrometeorological observations started in 19th
   century;
• Since the 1920s continuous data of air temperature and precipitation,
   as well as some other hydrometeorological parameters are digitized
   in electronic databases;
• Data from 1961 have been thoroughly verified and homogenized;
• Agrometeorological observations from 1950 until 1999 at ~10
   stations (non-digitized)

LEGMC

• Nowadays:
  – real time data from 78 hydrological and 27 meteorological observation
    stations are collected,
  – Doppler radar data from 2006,
  – Lightening observations in cooperation with FMI from summer 2018,
    additional historical statistics since 2006,
  – Intensive use of satellite data not only for operational monitoring of weather,
    but also monitoring of rivers and lakes; climate analysis, development of
    solar radiation atlas in cooperation with Polish, Lithuanian and Estonian
    NMSs and CM SAF

Meteorological observations

Meteorological observation network:
   – Basic meteorological observations
      with fully automated weather sensors
      at – 27 stations
   – Additional observations of
      precipitation and snow cover –
      together 34 stations
• Modernization of meteorological
  observation network will be finished at
  the end of 2018
• For operational purposes – real time
  (every 1 min) data are available; hourly
  data are stored in data base and available
  on our web page
• Climate overviews of decades, months and
  seasons are regularly issued on website

Analysis of Climate Data
In 2017 a project for analysis of climate changes was
finished – past and future climate analysis for time
periods 1961 – 2010 – 2100

Analyzed meteorological parameters - air temperature,
precipitation and wind speed. Past and future climate
and climate indices calculation, visualization and
interpolation with spatial resolution 10x10 km
          http://www2.meteo.lv/klimatariks/

Satellite Based Products for Operational and
                 Climate Applications
• Satellite-based Climate Atlas for Europe and
  Latvia
  http://www2.meteo.lv/climate_atlas/curl.php
• Satellite-based Solar Radiation Atlas (in
  cooperation with colleagues from Estonia,
  Lithuania and Poland)
  http://www2.meteo.lv/radiacija/curl_rad.php
• Historical solar illumination data
• Sea surface temperature and sea ice cover
• Ice cover in inland waters; monitoring of ice
  jams
• Flood monitoring during spring time floods
  (caused by snow melting and ice jams) and
  flash floods or floods caused by long lasting
  rains

Operational Forecasts

 Continues hydrological and meteorological monitoring and
         forecasting – services are provided 24/7:
• short and very short-range forecasts up to 2 days ahead; warnings about
  hazardous weather phenomena;
• medium-range forecasts up to 2 weeks ahead;
• long term forecasts – for next 4 weeks and seasonal forecasts

                                         Classification of hazardous meteorological phenomena in Latvia

Operational Forecasts

Hydraulic model for flood risk and flood hazard mapping is
development. Flood mapping for Venta, Lielupe and Gauja are done
and started for Daugava, including:
• flood risk territories (roads, polders, land use),
• risk objects (WWTP, residential areas),
• population density and estimation of the economic losses
Operational forecasting model is developed; 5 runs every day

                                                http://212.70.174.36/

Actual Issues of Summer 2018

  Calculation and mapping of indices for assessment of wet / drought
  of the environment:
  - SPI (Standardized Precipitation Index ) climatology for 1961-2017 –
     analysis for 1 / 3 / 6 / 12 monthly periods
  - Drought Index climatology for 1961-2017 – analysis for 1 month
     periods

July 1992                              September 2017

Future plans

 Next steps in products development towards Early Warning System:
• forecasts of SPI and Drought
  index for assessment of drought /
  wet conditions in monthly and
  seasonal ranges
• Use of satellite data for receiving
  of measurements of soil moisture
  and vegetation conditions - NDVI
  (Normalized Difference
  Vegetation Index)

Products
• LEGMC develops products based on clients requests:
 Illumination                   Climatological statistics and
                                probabilities

 Growing season length                             etc.

Thank you for the attention!

Latvian Environment, Geology and Meteorology Centre
165 Maskavas street
www.meteo.lv
https://twitter.com/LVGMC_Meteo
https://www.facebook.com/VSIALVGMC/