What is Intraseasonal?
What is Intraseasonal?
intraseasonal (not comparable) Within a season.
What is the MJO in weather?
The Madden-Julian Oscillation (MJO) is the major fluctuation in tropical weather on weekly to monthly timescales. The MJO can be characterised as an eastward moving ‘pulse’ of cloud and rainfall near the equator that typically recurs every 30 to 60 days. Read more: About the MJO.
What is monsoon Intraseasonal oscillation?
One phenomenon in particular, the monsoon intraseasonal oscillations (MISOs), has captured scientists’ interest. MISOs are alternating periods of heavy and minimal rainfall, each lasting for about a month or so and tending to follow a cyclical, northward shifting pattern from the equator to southern Asia.
What is inter annual variability?
Values for “Annual” describe the interannual standard deviation in annual average temperature or precipitation, while summer and winter are for the interannual variation in seasonal data. Standard deviation in precipitation was computed using the total precipitation in cm for a season or year.
What is Indian Ocean dipole Upsc?
Indian Ocean Dipole (IOD) is something that happens in the Indian Ocean. It is an atmospheric-ocean-based phenomenon just like the El Nino and La Nina, where the temperatures of the sea surface waters get warmed up in the positive phase of IOD and get cooled up in the negative phase of IOD.
How fast does the MJO move?
The MJO exhibits the mixed Kelvin-Rossby wave structure over the eastern hemisphere, but over the western hemisphere, it only shows a Kelvin wave structure. It moves through the eastern hemisphere at around 5 m/s and through the western hemisphere at a higher speed (at least 10 m/s).
What is El Nino Modoki?
El Niño Modoki is a coupled ocean-atmosphere phenomenon in the tropical Pacific. It is different from another coupled phenomenon in the tropical Pacific namely, El Niño. Conventional El Niño is characterized by strong anomalous warming in the eastern equatorial Pacific.
What is intra annual?
Definition of intra-annual: Refers to processes which occur on a time scale of less than 1 year but more than 1 month.
What are interannual variations?
Interannual climate variations, including droughts, floods, and other events, are caused by a complex array of factors and Earth system interactions. One important feature that plays a role in these variations is the periodic change of atmospheric and oceanic circulation patterns in the…
What is Indian Ocean dipole?
The Indian Ocean Dipole (IOD) is defined by the difference in sea surface temperature between two areas (or poles, hence a dipole) – a western pole in the Arabian Sea (western Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia.
What is the current Indian Ocean dipole?
The latest weekly value of the Indian Ocean Dipole (IOD) index to 19 December 2021 was −0.31 °C, within neutral bounds.
