2018 **Abstract:** It is the purpose of this paper to provide a comprehensive documentation of the new NCAR (National Center for Atmospheric Research) version of the spectral element (SE) dynamical core as part of the Community Earth System Model (CESM2.0) release. This version differs from previous releases of the SE dynamical core in several ways. Most notably the hybrid sigma vertical coordinate is based on dry air mass, the condensates are dynamically active in the thermodynamic and momentum equations (also referred to as co…

Help me understand this report

Search citation statements

Paper Sections

Select...

3

2

Citation Types

2

145

0

1

Year Published

2018

2023

Publication Types

Select...

3

3

Relationship

2

4

Authors

Journals

(148 citation statements)

2

145

0

1

“…CAM‐SE is formulated using a terrain‐following hybrid‐sigma vertical coordinate η but the coordinate levels are defined in terms of dry air mass per unit area ( M ( d ) ) instead of total air mass; η ( d ) (see Lauritzen et al, , for details). In such a coordinate system it is convenient to define the tracer state in terms of a dry mixing ratio instead of moist mixing ratio $${m}^{false(\ell false)}\equiv \frac{{\rho}^{false(\ell false)}}{{\rho}^{false(dfalse)}},\text{where}\phantom{\rule{0ex}{0ex}}\ell =\u2018w{v}^{\u2019},\u2018c{l}^{\u2019},\u2018c{i}^{\u2019},\u2018r{n}^{\u2019},\u2018s{w}^{\u2019},$$ where ρ ( d ) is the mass of dry air per unit volume of moist air and ρ ( ℓ ) is the mass of the water substance of type ℓ per unit volume of moist air.…”

confidence: 99%

“…CAM‐SE is formulated using a terrain‐following hybrid‐sigma vertical coordinate η but the coordinate levels are defined in terms of dry air mass per unit area ( M ( d ) ) instead of total air mass; η ( d ) (see Lauritzen et al, , for details). In such a coordinate system it is convenient to define the tracer state in terms of a dry mixing ratio instead of moist mixing ratio $${m}^{false(\ell false)}\equiv \frac{{\rho}^{false(\ell false)}}{{\rho}^{false(dfalse)}},\text{where}\phantom{\rule{0ex}{0ex}}\ell =\u2018w{v}^{\u2019},\u2018c{l}^{\u2019},\u2018c{i}^{\u2019},\u2018r{n}^{\u2019},\u2018s{w}^{\u2019},$$ where ρ ( d ) is the mass of dry air per unit volume of moist air and ρ ( ℓ ) is the mass of the water substance of type ℓ per unit volume of moist air.…”

confidence: 99%

“…Define associated heat capacities at constant pressure ${c}_{p}^{false(\ell false)}$. We refer to condensates as being thermodynamically and inertially active if they are included in the thermodynamic equation and momentum equations; for example, if the thermodynamic equation is formulated in terms of temperature, the energy conversion term includes a generalized heat capacity which is a function of the condensates and their associated heat capacities (see, e.g., section 2.3 in Lauritzen et al, ). Similarly, the weight of the condensates is included in the pressure field and pressure gradient force.…”

confidence: 99%