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Representativeness CDAS v 1.1 Implementation

Representativeness CDAS v 1.1 Implementation. Model-data mismatch due to boundary-layer/stable-layer height errors and spatial flux heterogeneities Weighting in assimilation will be set using a parameterization based on land/ocean, day/night, z, and monthly NEE and FF

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Representativeness CDAS v 1.1 Implementation

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  1. RepresentativenessCDAS v 1.1 Implementation • Model-data mismatch due to boundary-layer/stable-layer height errors and spatial flux heterogeneities • Weighting in assimilation will be set using a parameterization based on land/ocean, day/night, z, and monthly NEE and FF • Also, ground stations will not be allowed over vegetated or industrialized terrain

  2. 800 m 360 m 120 m Vertical and horizontal model coarseness

  3. Representativeness Formulae • land = 1 over land, 0 over ocean • night = 0 during day [6-18 LT], 1 during local night • pbl = 1 below 1500 m agl, 0 above • nsl = (500-z)/500 below 500 m, 0 above • z ~ 60 m, 240 m, 580 m for lowest levels • hem = 1.0 in N. Hem. and 0.5 in S. Hem. • R matrix values set to • hem+landmask * (pbl * (5+nsl * (50))) * ((|NEEmonthly| + |FFmonthly|) / max(|NEEmonthly|)) • also, anywhere ((|NEEmonthly| + |FFmonthly|) / max(|NEEmonthly|)) is greater than 0.05, ground station gets a ‘use’ of 0

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