In summary, an intensification of
the Asian summer monsoon and an enhancement of summer monsoon precipitation variability with increased greenhouse gases that was reported in the SAR has been corroborated by new studies.
«The South
Asian summer monsoon directly affects the lives of more than 1 / 6th of the world's population.
Seasonal forecasting of East
Asian summer monsoon based on oceanic heat sources.
Lee, E., T. N. Chase, and B. Rajagopalan, Highly improved predictive skill in the forecasting of the northern East
Asian summer monsoon, Water Resources Research (In Press)
Lee Eungul, Thomas N. Chase, Peter J. Lawrence, Balaji Rajagopalan, Model assessment of the observed relationjship between El Nino and the northern East
Asian summer monsoon using the CCSM3, J. Geophys.
Lee Eungul, Thomas N. Chase, Peter J. Lawrence, Balaji Rajagopalan, Model assessment of the observed relationship between El Nino and the northern East
Asian summer monsoon using the CCSM3, J. Geophys.
Lee, E., T. N. Chase, and B. Rajagopalan, Highly improved predictive skill in the forecasting of the northern East
Asian summer monsoon, Water Resources Research, 44, W10422, doi: 10.1029 / 2007WR006514
Lin J. L., K. M. Weickmann, G. N. Kiladis, B. E. Mapes, et al. (September 2008): Subseasonal Variability Associated with
Asian Summer Monsoon Simulated by 14 IPCC AR4 Coupled GCMs.
Shin, Z. Liu and Q. Liu (October 2016): Sensitivity of
Asian Summer Monsoon precipitation to tropical sea surface temperature anomalies.
It can also strengthen
the Asian summer monsoon circulation and cause a local increase in precipitation, despite the global reduction of evaporation that compensates aerosol radiative heating at the surface (Miller et al., 2004b).
The fourth assessment report of the IPCC had this to say about the monsoon: «It is likely that warming associated with increasing greenhouse gas concentrations will cause an increase of
Asian summer monsoon precipitation variability.
Using eight AOGCMs, Ueda et al. (2006) demonstrate that pronounced warming over the tropics results in a weakening of
the Asian summer monsoon circulations in relation to a reduction in the meridional thermal gradients between the Asian continent and adjacent oceans.
However, at the start of Bond events, which are smaller and briefer than Heinrich events,
the Asian summer monsoon weakened more gradually, taking about 110 years to reach its weakest point.
Increased southern East
Asian summer monsoon (SEASM) precipitation is related to warm WNP SST anomalies which create a weaker WNP anticyclone.
More recently we have examined the East
Asian summer monsoon (EASM) system and found that it is physically two distinct systems with a northern and southern component driven by distinct forcing mechanisms.
For example, the northern East
Asian summer monsoon (NEASM) is, for the years of highest SST anomalies in the tropical eastern Pacific (TEP), affected by the Pacific - East Asian (PEA) teleconnection pattern, which consists of a wave creating an anomalously strong western North Pacific (WNP) anticyclonic circulation and anomalously strong cyclonic circulation in the NEASM region, creating more monsoon rainfall.
Influence of the land surface in
the Asian summer monsoon: External conditions versus internal feedbacks
Variability in climatology and agricultural production in China in association with the East
Asian summer monsoon and El Nio Southern Oscillation
Li, H., Dai, A., Zhou, T. & Lu, J. Responses of East
Asian summer monsoon to historical SST and atmospheric forcing during 1950 — 2000.
Some studies suggest that climate change may be one of the reasons that
the Asian Summer Monsoon weakened.
Since El Nino also has an important impact on
the Asian Summer Monsoon in particular, its hard to know precisely what large - scale changes in atmospheric circulation are due to the radiative forcing of the eruption itself, and the secondary response to that eruption of ENSO.
The East
Asian summer monsoon and desertification in Eurasia is driven by fluctuating Northern Hemisphere ice volume and global sea level during the Ice Age, as shown in a study published in Nature Communications.
Annamalai, H., K. Hamilton, and K.R. Sperber, 2007: South
Asian summer monsoon and its relationship with ENSO in the IPCC AR4 simulations.
The broad comparability between the HML paleo - proxies, Chinese speleothem δ18Orecords, and the northern hemisphere summer insolation throughout the Holocene, suggests that solar insolation exerts a profound influence on ASM [
Asian summer monsoon] changes.
Based on a summer monsoon index derived from MSLP gradients between land and ocean in the East Asian region, Guo et al. (2003) found a systematic reduction in the East
Asian summer monsoon during 1951 to 2000, with a stronger monsoon dominant in the first half of the period and a weaker monsoon prevailing in the second half (Figure 3.35).
Not exact matches
This
summer, scientists produced a report finding that the
monsoon amounted to an «efficient smokestack» for
Asian pollution, spreading it «throughout the entire Northern Hemisphere.»
He has created computer simulations indicating that sulfate clouds could potentially weaken the
Asian and African
summer monsoons, reducing rain that irrigates the food crops of billions of people.
The other (much smaller) major pathway for transporting air from the lower atmosphere to the stratosphere is the
Asian monsoon circulation, which prevails in the
summer.
This long - term change in the East
Asian monsoon index is consistent with a tendency for a southward shift of the
summer rain belt over eastern China (Zhai et al., 2004).
During
summer, the
Asian Monsoon is not only important for Asia but affects weather patterns over the entire northern hemisphere.
In the tropics, an increase in precipitation is projected by the end of the 21st century in the
Asian monsoon and the southern part of the West African
monsoon with some decreases in the Sahel in northern
summer (Cook and Vizy, 2006), as well as increases in the Australian
monsoon in southern
summer in a warmer climate (Figure 10.9).
This is the regime of the
monsoon (rain - bearing winds), which is associated with the heating of the
Asian landmass in
summer and its intense cooling in winter.
In early
summer a second failure of the Indian
monsoon unleashes panic in the rice market, where
Asian households have been steadily hoarding.