Grid Project:  Arctic Fine Mesh for Areas A and B

Version History

Project Overview

These meshes were developed in support of the Arctic Next Generation Ecosystem Experiment (NGEE-Arctic) Project and LANL Laboratory Directed project LDRD20120068DR. These two projects share a need for high quality computational meshes for use in fine-scale modeling of thermal hydrology in ice-wedge polygon landscapes.

The conceptual design for these models are based on observations and data collected for the Arctic project. The top
surface uses elevation and image data of tundra areas A, B, and C.
The top surfaces of these models are polygonal tundra shapes and elevations derived from actual LiDAR data sets.
The subsurface layers of the models are based on descriptions and observations of core data. The layers represented are
moss (part of the active layer), organic, and mineral.
The ice wedge shape follows the tundra polygons and have a constant rim width and constant depth to pinched end point. The top of the ice wedge is below the permafrost boundary.

Mesh Versions 4.2 Fine Deep with 6 Layers plus Ice

These are single polygon meshes selected from Area A Low Center Polygons (LCP) and Area B High Center Polygons (HCP). Parameters and workflow are based on V3.2.C.1 Area C fine deep mesh in
/scratch/sft2/lucia/grid_gen/arctic/arctic_fine_deep_poly06/
Modified so moss has 1 cell layer instead of 2 cells. The moss layer thickness remains .02 meters. Modified for adjustment of ice width and slope.

Input Parameters

• Layer 1 (top) is moss and should be 2 cm thick.
• The organic layers combined are 48 cm thick.
• Top organic and mineral layer are the same with thickness of 18 cm.
• Lowest organic layer is about 3/4 the thickness of upper 2 layers. Set thickness to 12 cm.
• The bottom Materials 5 and 6 are both mineral soils with higher resolution at the top of the mineral soil.
• The bottom material 6 has variable thickness with higher resolution layers at the top.
  
• The domain bottom should be flat at Z = -45.

• The top of the ice wedge should be at 50 cm depth (corresponds to the top of the inorganic layer).
• Top of wedge starts at top of mineral layer (replaces cells only in materials 5 and 6)
• Depth from top of ice to tip is aprox 2.8
• Top ice wedge width (distance from polygon) is aprox 1.4m or 4.5m

Stacked Layers

  ID  Name         Mat Thickness  Num Cells
  1   moss             .02          1
  2   upper organic    .18          9
  3   upper mineral    .18          9 
  4   lower organic    .12          6
  5   lower mineral    .50         20
  6   deep mineral     ~49         85
  7   ice              ~2.8        --

Gallery of All Mesh Images

GIS Source DEM and Polygon Data

Workflow to Create Mesh

Mesh Archives

AREA A V4.2.0_A.1 Low Center Polygon #1 AREA A Polygon #1 Nodes: 381,603 Cells: 73,2160 MIN MAX LENGTH (meters) x 92.1925 116.3908 24.20 y 2.7314 21.4030 18.67 z -45.000 5.5044 50.50 Links: Mesh Gallery of Images Input LiDAR and Polygon Data Ice Wedge Width 4.5 meters File README.txt Download: mesh_poly01_W4.5m.tgz (9.6M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/output_poly01_W4.5m Ice Wedge Width 1.4 meters Mesh Details (ice 1.4m) Method for this Mesh (ice 1.4m) File README.txt Download ExodusII Mesh Only: mesh_areaa_poly01_v04.2.A.1.tgz (9M) Download Full Archive: archive_areaa_poly01_v04.2.A.1.tgz (54M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/areaa_fine_deep_poly01

AREA A V4.2.0_A.2 Low Center Polygon #2 AREA A Polygon #2 Nodes: 1,429,603 Cells: 2,795,520 MIN MAX LENGTH (meters) x 103.3655 146.4927 43.1272 y 108.1380 152.5730 44.4350 z -45.0000 5.4400 50.4400 Links: Mesh Gallery of Images Input LiDAR and Polygon Data Ice Wedge Width 4.5 meters File README.txt Download: mesh_poly02_W4.5m.tgz (60M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/output_poly02_W4.5m Ice Wedge Width 1.4 meters File README.txt Download: mesh_poly02_W1.4m.tgz (62M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/output_poly02_W1.4m

AREA A V4.2.0_A.5 Low Center Polygon #5 AREA A Polygon #5 Nodes: 983,155 Cells: 1,913,600 MIN MAX LENGTH (meters) x 125.2786 153.5197 28.2411 y 174.2351 215.1728 40.9377 z -45.0000 5.3211 50.3211 Links: Mesh Gallery of Images Input LiDAR and Polygon Data Ice Wedge Width 4.5 meters File README.txt Download: mesh_poly05_W4.5m.tgz (43M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/output_poly05_W4.5m Ice Wedge Width 1.4 meters File README.txt Download: mesh_poly05_W1.4m.tgz (39M) Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/output_poly05_W1.4m

AREA B V4.2.0_B.1 High Center Polygon #1 (replaced Jan 2017) AREA B LiDAR with High Center Polygon #1 Nodes: 413043 Cells: 798720 The elevation data for this mesh was corrected to cell centers. The result is a slight correction of the polygon relative to elevations. MIN MAX LENGTH (meters) x 102.551 127.760 25.2087 y 84.975 109.696 24.7216 z -45.000 5.441 50.4413 REPLACED DATA (from Nov 2016) x 102.300 127.510 25.2087 y 84.975 109.696 24.7216 z -45.000 5.449 50.4486 Links: Mesh Details Mesh Gallery of Images Input LiDAR and Polygon Data Method for this Mesh File README.txt Download ExodusII Mesh Only: mesh_areab_poly01_v04.2.B.1.tgz (9.2M) Files: mesh_fs.exo README.txt Download Full Archive: archive_areab_poly01_v04.2.B.1.tgz (63M) Files: mesh_fs.exo .inp .gmv README.txt mesh.html method.html Folders: /images /lagrit_input_files /lagrit_output_files Local: /scratch/sft/tam/grid_gen/arctic/areab_fine_deep/areab_fine_deep_poly01