Explorer " Elevated heat pump " hypothesis for the aerosol - monsoon hydroclimate link : " Grounded " in observations ?

“Elevated heat pump” hypothesis for the aerosol‐monsoon hydroclimate link: “Grounded” in observations?

[1] The viability of the elevated heat pump hypothesis, a mechanism proposed by Lau and Kim (2006) for absorbing aerosols’ impact on South Asian summer monsoon hydroclimate, is assessed from a careful review of these authors’ own analysis and others since then. The lack of appreciation of the spatial distribution of the aerosol‐related precipitation signal over the Indian subcontinent, its east...

Aerosol–Monsoon Hydroclimate Link: “Grounded” in Observations?

Reply to comment by K. M. Lau and K. M. Kim on “‘Elevated heat pump’ hypothesis for the aerosol–monsoon hydroclimate link: ‘Grounded’ in observations?”

[1] Lau and Kim’s [2011] (hereinafter LK11) defense of the elevated heat pump (EHP) hypothesis is unsubstantiated. Nigam and Bollasina [2010] (hereinafter NB10) have assessed the viability of the EHP hypothesis [Lau et al., 2006; Lau and Kim, 2006] (hereinafter LK06) from a careful review of LK06’s own analysis and other related studies since then [e.g., Bollasina et al., 2008; Gautam et al., 2...

Absorbing aerosols and pre-summer monsoon hydroclimate variability over the Indian subcontinent: The challenge in investigating links

Article history: Received 23 March 2009 Received in revised form 2 June 2009 Accepted 17 June 2009 The sub-monthly evolution of the interannual variations of absorbing aerosols and related hydrometeorology over South Asia in the pre-monsoon period is investigated from the analysis of pentad-resolution observational datasets. It is shown that pre-monsoon (late April–early May) variations are cha...

Asian summer monsoon anomalies induced by aerosol direct forcing: the role of the Tibetan Plateau

In this paper we present results of a numerical study using the NASA finite-volume GCM to elucidate a plausible mechanism for aerosol impact on the Asian summer monsoon involving interaction with physical processes over the Tibetan Plateau (TP). During the premonsoon season of March–April, dusts from the deserts of western China, Afghanistan/Pakistan, and the Middle East are transported into an...