WMO RB - Theme 2 Research related to modelling and observational water (liquid, vapor, solid) in the Earth modelling system and understanding weather and climate impacts on surface/groundwater hydrology: reproducing the past, forecasting today, predicting for the next decades by Ilias Pechlivanidis https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y Made with ♥ en-us 2021-12-06 12:33:05 UTC 2021-12-06 13:37:01 UTC hello@padlet.com Observations iliaspechlivanidis https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930993881 (1) Measurement to help "constrain" the hydrological models are not fully available and for all variables.

(2) The water cycle closes in the global scale, but not in the regional river systems. Intensive measurement of the river basins that close the water balance. Need to understand all elements from the observational side.
"In the model world everything is closed, not in the observational world (model world vs real/obs world)"

]]> 2021-12-06 12:49:28 UTC https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930993881 Models iliaspechlivanidis https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930994168 (1) Is it only water quantity? We need to involve quality aspects too.


(2) What about estuaries? One needs to have all three (hydrology, oceonography and meteorology)

(3) Bias correction is not always applied. The objective is to bring the NWP precipitation as close to reality.

(4) Tree interception is important for evaporation. A fully detailed model is complicated.


]]> 2021-12-06 12:49:38 UTC https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930994168 Challenges iliaspechlivanidis https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930994837 (1) In hydrological modelling: Input from atmosphere (prec. temp), bias correction, hydrological modeling.
In weather and climate modelling: very few consider (maybe not successful examples) the result of water in the surface and the feedback to atmosphere.

(2) We have the same Earth and yet models differ in terms of processes and land and soil properties.

(3) Difference between weather and climate forecasting, since the science is different and the approach is different too.

]]> 2021-12-06 12:49:58 UTC https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930994837 Hydrological modelling for different purposes iliaspechlivanidis https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930995334 Approaches are different depending on how hydrological modelling is conducted.
(1) Historical assessment: to understand model limitations.
(2) Short and medium-range and S2S forecasting: subject to historical model performance, initial hydrological conditions and NWP accuracy.
(3) Decadal and centential projections: need for bias correction and depends on historical model performance and GCM accuracy.]]> 2021-12-06 12:50:15 UTC https://padlet.com/iliaspechlivanidis/x8lm9pprhul915y/wish/1930995334