– Land feedbacks may be crucial for the occurrence of meteorological drought events –
As rainfall deficits dry out soil and vegetation, the evaporation of land water is reduced.
Then the local air becomes too dry to yield rainfall, which further enhances drought conditions.
But this may not be just a 'local’ feedback.
The rainfall in remote regions may rely on evaporated water transported by winds from the drought-affected region, leading to teleconnected feedbacks.
Following this rationale, droughts may be able to self-propagate and self-intensify. This is the central hypothesis and core subject of investigation of DRY–2–DRY.
– The objectives of DRY–2–DRY strive towards understanding the role of land during droughts –
1 . To provide evidence of the impact of drought on evaporation from soil and vegetation (WP1).
2 . To disentangle the effect of land feedbacks on the occurrence of local rainfall during droughts (WP2).
3 . To unravel the effect of land feedbacks on the expansion and concatenation of droughts (WP3).
4 . To quantify the influence of land cover and value of land management in dampening drought (WP4).