hat
Obsèvasyon yo endike ke chanjman yo rive nan kantite, entansite, frekans, ak kalite presipitasyon. Modèl presipitasyon demontre gwo varyasyon natirèl akòz El Niño ak chanjman nan modèl sikilasyon atmosferik tankou osilasyon Nò Atlantik la. Tandans alontèm sou dènye syèk lan montre siyifikativman pi mouye kondisyon nan lès Nò ak Amerik di Sid, Ewòp nò ak nan sid santral, men pi sèk nan Sael, Afrik di sid, Mediterane a ak sid Azi. Ogmante vapè dlo nan pi cho klima mennen nan evènman pi gwo presipitasyon entans ak yon risk ogmante nan tou de sechrès (kote li pa lapli) ak inondasyon (kote li ap lapli). Sik evènman El Niño a afekte dramatikman distribisyon ak tan inondasyon ak sechrès, patikilyèman nan twopik yo ak sou anpil nan latitid mitan nan peyi Pasifik-rim.
eng
Observations indicate that changes are occurring in the amount, intensity, frequency, and type of precipitation. Precipitation patterns demonstrate large natural variability due to El Niño and changes in atmospheric circulation patterns such as the North Atlantic Oscillation. Long-term trends over the last century show significantly wetter conditions in eastern North and South America, northern Europe and northern and central Asia, but drier in the Sahel, southern Africa, the Mediterranean and southern Asia. Increased water vapor in warmer climates leads to more intense precipitation events and an increased risk of both drought (where it is not raining) and floods (where it is raining). The cycle of El Niño events dramatically affects the distribution and timing of floods and droughts, particularly in the tropics and over much of the mid-latitudes of Pacific-rim countries.