San Nicolo Cathedral, Noto, UNESCO, Noto Valley, Sicily, Italy

Angochagua, Imbabura Province, Ecuador

Christmas Market stalls in the market square in Altstadt Spandau at dusk, Spandau, Berlin, Germany

A view of Naples with The Castel Sant'Elmo high in the background. Naples, Campania, Italy

View of people and market stalls at Christmas, Breitscheidplatz, Berlin, Germany

View of Opera House and harbourside saunas during winter at sunrise, Oslo, Norway, Scandinavia

View of the Harpa Concert Hall and Conference Centre, Reykjavik, Iceland

View of the Harpa Concert Hall and Conference Centre, Reykjavik, Iceland

View of Christmas tree and The National Museum during winter, Oslo, Norway, Scandinavia

View of Harpa Concert Hall and Conference Centre in the city centre in winter, Reykjavik, Iceland

View of Harpa Concert Hall and Conference Centre in the city centre in winter, Reykjavik, Iceland

Storm waves (Storm Eowyn), Porthcawl Pier, South Wales, United Kingdom

Storm waves (Storm Eowyn), Porthcawl Pier, South Wales, United Kingdom

View of market stalls and Shitenno-ji Gojunoto (Five Story Pagoda) on a sunny day, Shitennoji, Tennoji Ward, Osaka, Honshu, Japan

View of market stalls and Shitenno-ji Gojunoto (Five Storey Pagoda) on a sunny day, Shitennoji, Tennoji Ward, Osaka, Honshu, Japan

Storm waves (Storm Eowyn), Porthcawl Pier, South Wales, United Kingdom

Sheep brave the extreme weather event of late March 2013 near Ambleside in the Lake District, Cumbria, England, United Kingdom, Europe

Massive snow drifts on the side of the Kirkstone Pass road during the extreme weather event of late March 2013, above Ambleside in the Lake District, Cumbria, England, United Kingdom, Europe

Holly tree covered in snow on the side of Helvellyn, in the extreme weather event of late March 2013, Lake District, Cumbria, England, United Kingdom, Europe

Massive snow drifts on the side of the Wrynose Pass road during the extreme weather event of late March 2013, Lake District, Cumbria, England, United Kingdom, Europe

Cows surviving outside during the late March 2013 extreme weather event, near Hawkshead, Lake District, Cumbria, England, United Kingdom, Europe

A diver watches in awe a dense soup of tunicates aggregated by very special sea conditions. This picture was taken during a special event occurred on April 2019 in the Strait of Messina, when special conditions of weather, sea currents and moon phases brought close to surface a lot of pelagic subjects, including a few usually living very deep.

A common mediterranean jellyfish (Pelagia noctiluca) feasting on another mediterranean jellyfish (Neoturris pileata), rarely seen in shallow waters. This picture was taken during special event occurred on April 2019 in the Strait of Messina, when special conditions of weather, sea currents and moon phases brought close to surface a lot of pelagic subjects, including a few usually living very deep.

Global Temperature Anomaly, 2009

Launching Weather Balloon, 1944

Launching Pilot Balloon, 1944

Signal Corps Checks Weather Balloon, 1918

In an El Nino event, the upper water layer thickens and upwelled water contains fewer nutrients, lowering marine productivity.

Crowd in raincoats, Knights' Tournament in Kaltenberg, Upper Bavaria, Bavaria, Germany, Europe

A drought is an extended period of months, or years, when a region notes a deficiency in its water supply. Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region.