The average sea level worldwide is 1.8 mm per year. The fragmentation of this rise makes those responsible for the 1,1 mm rise well known, the expansion of water due to the presence of warmer oceans and the melting of land ice masses. Researchers at the University of Tokyo published in May in the journal Nature Geoscience the presence of water that humans use directly after 0.7 millimeters missing. Specifically, it has been concluded that practically all of this contribution comes from the evacuation of aquifers: 42% of the sea level increase experienced between 1961 and 2003 has been attributed in the study carried out through a simulation model of global water storage and flows.
The researcher has also surprised that our contribution of water to drink, for industry and for irrigation is so high at sea level rise. In fact, previous studies have considered that the increase in the exploitation of aquifers was equivalent to the elimination of storage by dam.
In fact, a research group from the University of Utrecht has released very similar conclusions in the journal Geophysical Research Letters in May. It is estimated that the contribution of aquifer evacuation to sea level rise has multiplied by sixteen between 1900 and 2000, standing at 0.035 millimeters annually. beginning of the century and 0.57 mm at the end.
The sources and simulations of the data used by the two research groups have been different, recognizing both limitations. However, they show clear guidance and underline the need for more rigorous measurements of groundwater use to confirm the results and deepen their consequences.