Computer Animations

  1. The Indian Monsoon's Intraseasonal Hydrology
  2. The Australian Monsoon's Intraseasonal Hydrolgoy
  3. Annual Cycle of Precipitation Over the Pacific / Atlantic
  4. Annual Cycle of Precipitation Over the Austral-Asian Monsoon Region

The Indian Monsoon

  • The Indian monsoon is characterized by interhemispheric exchanges. The graph above (courtesy of SCRIPPS) demonstrates this well with low-level parcel tradgectories (ribbons) and winds (arrows).
  • The vast majority of moisture which precipitates during the monsoon is supplied by evaporation in the southern hemisphere.

    Intraseasonal Variations in hydrology are also large

    The following quick time movie displays the composite behavior of 40 active periods of the Indian Monsoon.
    It shows anomalies of :
  • Evaporation : CONTOUR LINES
  • OLR : FILLED CONTOURS
  • Moisture Transport : ARROWS

    • Negative anomalies are BLUE, positive anomalies are RED.
    A quick time movie of Indian Monsoon Intraseasonal Hydrology

    What to look for

  • Day -30 to -20 : Note the large scale evaporative anomalies in the southern hemisphere. Near Day -22 they are accompanied by northwards transport of moisture towards the equator, where convection subsequently intensifies.
  • Day -20 to -12 : Intensification of near equatorial convection . Below normal convection over India.
  • Day -12 to 2 : Northwards propagation of deep convection, westerly wind anomalies and large-scale evaporative anomalies over the Arabian Sea and Bay of Bengal. Below normal convection over the equator.
    • Also : A quick time movie of Australian Monsoon Intraseasonal Hydrology

    TROPICAL PRECIPTATION (MSU) PACIFIC / ATLANTIC- ANNUAL CYCLE

    click here.

    ANNUAL CYCLE OF AUSTRAL-ASIAN PRECIPITATION (MSU)

    click here.