You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
Does this tag change answers significantly for any of the following physics configurations?
19
+
(Details of any changes will be given in the "Answer changes" section below.)
20
+
21
+
[Put an [X] in the box for any configuration with significant answer changes.]
22
+
23
+
[ ] clm6_0
24
+
25
+
[ ] clm5_0
26
+
27
+
[ ] ctsm5_0-nwp
28
+
29
+
[ ] clm4_5
30
+
31
+
32
+
Bugs fixed
33
+
----------
34
+
35
+
List of CTSM issues fixed in the included PRs:
36
+
- [ESCOMP/CTSM Issue #103: Example 1.7 typo](https://github.com/ESCOMP/CTSM/issues/103)
37
+
- [ESCOMP/CTSM Issue #3488: Add RC14_CANAIR as optional to history output so that C14 time series data can be verified](https://github.com/ESCOMP/CTSM/issues/3488)
38
+
- [ESCOMP/CTSM Issue #3490: Change history averaging of RC13_CANAIR and RC14_CANAIR so that zero's aren't averaged in](https://github.com/ESCOMP/CTSM/issues/3490)
The previous leaching mechanism is not designed for describing the vertical transport of :math:`{NO}_{3}^{-}` in soil, an alternative way to evaluate the vertical convective, diffusive, and dispersive of dissolved :math:`{NO}_{3}^{-}` in soil is provided in (:ref:`Luo et al. 2025 <Luoetal2025>`).
140
+
To obtain the vertical profile of soil mineral N after vertical movement of each timestep, the vertical transport equation is summarized in :eq:`22.20`.
141
+
142
+
.. math::
143
+
:label: 22.20
144
+
145
+
\frac{\partial NS_{sminn}}{\partial t} = \frac{\partial J}{\partial z} + S
146
+
147
+
where :math:`NS_{sminn} (gN m^{-3})` is the soil :math:`{NO}_{3}^{-}` concentration in each layer, :math:`J (gN m^{-2} s^{-1})` is the different vertical transport terms (:math:`J_{convective}, J_{diffusive}, J_{dispersive}`) between two soil layers, and :math:`S` is the sources or sinks fluxes.
148
+
Different transport terms are explained below
149
+
150
+
.. math::
151
+
:label: 22.21
152
+
153
+
J_{convective} = sf \frac{SN_{sminn}q_{out}}{\theta}
154
+
155
+
where :math:`q_{out} (mH_{2}Os^{-1})` is the darcy flow of water, :math:`\theta (m^3H_{2}O m^{-3}soil)` is the soil water content.
where :math:`\partial SN_{sminn}/ \partial z` is the concentration gradient, :math:`D_{aq}` is the nitrate aqueous diffusion coefficient which is taken as :math:`1.7*10^{-9} m^{2}s^{-1}`, and :math:`\phi (m^3m^{-3})` is soil porosity.
where :math:`D_{dis}` is the dispersion coefficient, which equal to :math:`L_{dis} q_{out} \theta ^{-1}`, for simplicity reasons, :math:`L_{dis}` is taken as 0.1 meter.
170
+
171
+
Finally, the classical convective-diffusion algorithm described in (:ref:`Patankar.2018 <Patankaretal2018>`) is used to discrete and solve the :math:`{NO}_{3}^{-}` vertical transport :eq:`22.20` in soils.
172
+
The advantage of this leaching mechanism is the soil :math:`{NO}_{3}^{-}` is able to move vertically (both upward or downward) with soil water movement, the mass of :math:`{NO}_{3}^{-}` reaches bedrock layer is finally taken as the :math:`NF_{leached}`.
Copy file name to clipboardExpand all lines: doc/source/tech_note/References/CLM50_Tech_Note_References.rst
+8Lines changed: 8 additions & 0 deletions
Display the source diff
Display the rich diff
Original file line number
Diff line number
Diff line change
@@ -843,6 +843,10 @@ Lowe, P.R. 1977. An approximating polynomial for the computation of saturation v
843
843
844
844
Luo, Y., Hui, D., and Zhang, D. 2006. Elevated CO2 stimulates net accumulations of carbon and nitrogen in land ecosystems: a meta-analysis. Ecology 87:53-63.
845
845
846
+
.. _Luoetal2025:
847
+
848
+
Luo J, Hess P G, Hall S, et al. Agricultural emissions of reactive nitrogen gases from constrained simulations using the Community Land Model. Authorea Preprints, 2025.
849
+
846
850
.. _Magilletal1997:
847
851
848
852
Magill, A.H. et al., 1997. Biogeochemical response of forest ecosystems to simulated chronic nitrogen deposition. Ecological Applications, 7: 402-415.
@@ -1048,6 +1052,10 @@ Parton, W. et al. 1996. Generalized model for N2 and N2O production from nitrifi
1048
1052
1049
1053
Parton, W.J. et al. 2001. Generalized model for NOx and N2O emissions from soils. J. Geophys. Res. 106(D15):17403-17419.
1050
1054
1055
+
.. _Patankaretal2018:
1056
+
1057
+
Patankar S., 2018. Numerical heat transfer and fluid flow[M]. CRC press., Boca Raton, section 5.2, 80-95 pp
1058
+
1051
1059
.. _Paterson1994:
1052
1060
1053
1061
Paterson, W.S.B., 1994. The Physics of Glaciers. Elsevier Science Inc., New York, 480 pp.
0 commit comments