Differences

This shows you the differences between two versions of the page.

--- data:dust_cesm [2017/10/17 09:15]
jypeter Misc changes and started the Variables section
+++ data:dust_cesm [2019/03/01 13:59]
jypeter [Contact] Sam's address updated
@@ Line 1: / Line 1: @@
 ====== PMIP4 CESM dust data ======
+<WRAP center round important 60%>
+The ''conc'' data files were updated on February 26th 2019 (see //conc// in the 3D part of the [[#variables|Variables]] section below). Make sure you use the correct version of the data!
+</WRAP>
+===== Contact =====
+Information and data provided by [[samuel.albani@unimib.it|Samuel Albani]]
 ===== Data files =====
@@ Line 37: / Line 46: @@
     * dimensions: [time, size, latitude, longitude]
     * units: kg m-2 s-1
+  * **load**: Dust load (size-resolved)
+    * atmosphere_mass_content_of_dust_dry_aerosol_particles
+    * dimensions: [time, size, latitude, longitude]
+    * units: kg m-2
+  * **aot**: Dust Aerosol Optical Thickness (size-resolved) at 550 nm
+    * atmosphere_optical_thickness_due_to_dust_dry_aerosol_particles
+    * dimensions: [time, size, latitude, longitude]
+    * units: 1 (//unitless//)
+  * **ddep**: Dust dry deposition flux (size-resolved)
+    * tendency_of_atmosphere_mass_content_of_dust_dry_aerosol_particles_due_to_dry_deposition
+    * dimensions: [time, size, latitude, longitude]
+    * units: kg m-2 s-1
+  * **wdep**: Dust wet deposition flux (size-resolved)
+    * tendency_of_atmosphere_mass_content_of_dust_dry_aerosol_particles_due_to_wet_deposition
+    * dimensions: [time, size, latitude, longitude]
+    * units: kg m-2 s-1
+  * **rfts**: Dust Direct Radiative Forcing (TOA, SW)
+    * toa_net_downward_shortwave_radiative_forcing_due_to_dust_dry_aerosol_particles
+    * dimensions: [time, latitude, longitude]
+    * units: W m-2
+  * **rftl**: Dust Direct Radiative Forcing (TOA, LW)
+    * toa_net_downward_longwave_radiative_forcing_due_to_dust_dry_aerosol_particles
+    * dimensions: [time, latitude, longitude]
+    * units: W m-2
+  * **rfss**: Dust Direct Radiative Forcing (surface, SW)
+    * surface_net_downward_shortwave_radiative_forcing_due_to_dust_dry_aerosol_particles
+    * dimensions: [time, latitude, longitude]
+    * units: W m-2
+  * **rfsl**: Dust Direct Radiative Forcing (surface, LW)
+    * surface_net_downward_longwave_radiative_forcing_due_to_dust_dry_aerosol_particles
+    * dimensions: [time, latitude, longitude]
+    * units: W m-2
+==== 3D dust field ====
+  * **conc**: Dust concentration (size resolved)
+<WRAP center round important 60%>
+The actual units of the ''conc'' variable in the downloadable NetCDF files (**μg m-3**) were not consistent with the units listed in the files metadata (**kg m-3**) and the variable description below.
+Corrected files (where a scaling factor of 1.e-9 was applied to the data of the previous files) were uploaded on February 26th March 2019.
+The Download section at the end of this page lists both the crossed out md5sum **checksum** of the old files, and the checksum of the new files. The new files also have a new //comment// global attribute saying ''This file REPLACES the previous file that had a md5sum of xxxxxxx''
+</WRAP>
+    * mass_concentration_of_dust_dry_aerosol_particles_in_air
+    * dimensions: [time, size, lev, latitude, longitude]
+    * units: kg m-3
-==== 3D dust fields ====
+The ''PMIP4_DUST_Albani_conc_<exp>.nc'' files also store the ancillary variables necessary to fully describe the vertical coordinate
+  * **ilev**: hybrid level at interfaces (1000*(A+B))
+    * atmosphere_hybrid_sigma_pressure_coordinate
+    * dimensions: [ilev]
+    * units: 1
+    * p(n,k,j,i) = a(k)*p0 + b(k)*ps(n,j,i)
+    * a: hyai b: hybi p0: P0 ps: PS
+  * **PS**: Surface pressure
+    * surface_air_pressure
+    * dimensions: [time, latitude, longitude]
+    * units: Pa
+  * **hyam**
+    * hybrid A coefficient at layer midpoints
+  * **hybm**
+    * hybrid B coefficient at layer midpoints
+  * **hyai**
+    * hybrid A coefficient at layer interfaces
+  * **hybi**
+    * hybrid B coefficient at layer interfaces
 ===== References =====
 <WRAP center round important 60%>
-Please cite **all** the following papers
+Please cite **at least one** of the following papers
 </WRAP>
   * Albani, S., Mahowald, N. M., Perry, A. T., Scanza, R. A., Zender, C. S., Heavens, N. G., Maggi, V., Kok, J. F., and Otto-Bliesner, B. L.: **Improved dust representation in the Community Atmosphere Model**, J. Adv. Model. Earth Syst., 6, 541–570, doi:[[http://onlinelibrary.wiley.com/doi/10.1002/2013MS000279/abstract|10.1002/2013MS000279]], 2014.
+    * Note: this paper describes the LGM simulation
   * Albani, S., Mahowald, N. M., Winckler, G., Anderson, R. F., Bradtmiller, L. I., Delmonte, B., François, R., Goman, M., Heavens, N. G., Hesse, P. P., Hovan, S. A., Kang, S., Kohfeld, K. E., Lu, H., Maggi, V., Mason, J. A., Mayewski, P. A., McGee, D., Miao, X., Otto-Bliesner, B. L., Perry, A. T., Pourmand, A., Roberts, H. M., Rosenbloom, N., Stevens, T., and Sun, J.: **Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives**, Clim. Past, 11, 869-903, doi:[[http://www.clim-past.net/11/869/2015/|10.5194/cp-11-869-2015]], 2015.
+    * Note: this paper describes the mid-Holocene simulation
   * Albani, S., Mahowald, N. M., Murphy, L. N., Raiswell, R., Moore, J. K., Anderson, R. F., McGee, D., Bradtmiller, L., Delmonte, B., Hesse, P. P., and Mayewski, P. A.: **Paleodust variability since the Last Glacial Maximum and implications for iron inputs to the ocean**, Geophys. Res. Lett., 43, doi:[[http://onlinelibrary.wiley.com/doi/10.1002/2016GL067911/abstract|10.1002/2016GL067911]], 2016.
+    * Note: this paper describes the pre-Industrial simulation and compares it to the mid-Holocene and LGM simulations in previous papers
 ===== Download =====
@@ Line 67: / Line 145: @@
 | a99c8627d21cdc67ab989437b0808e00 | PMIP4_DUST_Albani_aot_MH.nc |
 | 118d105d29a7da31e5a443fba87c4e96 | PMIP4_DUST_Albani_aot_PI.nc |
-| 5fa086e300324080614db8175b223220 | PMIP4_DUST_Albani_conc_LGM.nc |
+| 0e8fb61f0eea7dd9beb756312ee440cb\\ Do not use files that have the crossed out md5sum below\\ <del>5fa086e300324080614db8175b223220</del> | PMIP4_DUST_Albani_conc_LGM.nc |
-| e7c929737c681bde8cde11198578af9e | PMIP4_DUST_Albani_conc_MH.nc |
+| 3864a144e192eaaa2f0920a32725ac77\\ Do not use files that have the crossed out md5sum below\\ <del>e7c929737c681bde8cde11198578af9e</del> | PMIP4_DUST_Albani_conc_MH.nc |
-| bf0baa1a003a2d85d306d62e2b5f20f9 | PMIP4_DUST_Albani_conc_PI.nc |
+| 038ccdb03dd0bf34a96c8912d59d9463\\ Do not use files that have the crossed out md5sum below\\ <del>bf0baa1a003a2d85d306d62e2b5f20f9</del> | PMIP4_DUST_Albani_conc_PI.nc |
 | 3727a77888c8809a0f87c8e51e37668b | PMIP4_DUST_Albani_ddep_LGM.nc |
 | 568f5f2ecc516a618b27aebbf6ac8475 | PMIP4_DUST_Albani_ddep_MH.nc |