Grid Project:  Arctic Project

Grid Team Member: Lucia Short
Version: Fine scale
Data Source: LiDAR data Area C from Chandana Gangodagamage
Delivered To: Scott Painter
Date: April 2013 to present

Version History

Version Scope Finished Total
Fine Deep Mesh
V3.2.0_C.1 Area C Single Polygon 06 Nov 2013 229,284 Nodes and 435,968 Cells
V3.2.0_C.2 Area C Single Polygon 31 Nov 2013 330,660 Nodes and 637,184 Cells
V3.2.0_C.3 Area C Single Polygon 44 Nov 2013 159,588 Nodes and 301,824 Cells
V3.2.0_C.4 Area C Single Polygon 45 Nov 2013 698,148 Nodes and 1,358,208 Cells
V3.2.0_C.5 Area C Multiple Polygons "lobster+" Nov 2013 7,651,908 Nodes and 15,057,664 Cells
Fine Mesh
V3.1.0_C.1.1 Area C Multiple Polygons "lobster+" July 2013 5,622,993 Nodes and 11,034,624 Cells
V3.1.0_C.1 Area C Multiple Polygons "lobster" July 2013 5,242,753 Nodes and 10,285,056 Cells
V3.1.0_C.0 Area C All Polygons July 2013 16,970,053 Nodes and 33,441,792 Cells
V3.1.0 Area C Group 40 June 2013 1,404,657 Nodes and 2,740,224 Cells
V3.0.2 Area C Single 06 with corners Nov 2013 168,489 Nodes and 319,488 Cells
V3.0.1 Area C Single 40 with corners July 2013 311,273 Nodes and 602,112 Cells
V3.0.0 Area C Single 40 June 2013 311,273 Nodes and 602,112 Cells
V2.0.0 Area C Single 40 June 2013 311,273 Nodes and 602,112 Cells
V1.0.0 Area C Single 40 Prototype May 2013 51,344 Nodes and 94,080 Cells
Test Mesh
Test1 Column with flat top Oct 2013 291 Nodes and 96 Cells
Test2 Flat top, deep mesh Nov 2013 396 Nodes and 131 Cells
Test3 Coordiante change, deep mesh Feb 2014 396 Nodes and 131 Cells
Test4 Upper organic layer = 0.10 m Mar 2014 387 Nodes and 128 Cells
Test5 No moss layer, upper organic 8cm Mar 2013 378 Nodes and 125 Cells
Test6 Upper organic layer = 0.06 m Mar 2014 381 Nodes and 126 Cells
Test7 No moss layer, upper organic 4cm Mar 2013 372 Nodes and 123 Cells
Test8 Upper organic layer = 0.16 m Mar 2014 393 Nodes and 130 Cells
Test9 No moss layer, upper organic 14cm Mar 2013 384 Nodes and 127 Cells

Purpose of Project

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.

Input Elevations

The input data is organized into a set of files that contain data extracted from lidar data. The data set is canonized by Chandana Gangodagamage and organized into files. One file contains ground surface elevations for the area and several files contain reference coordinates for polygons separated into one file per polygon. 

Conceptual Model

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 subsurface layers and ice_wedges are derived
from the top elevations and are generalizations of field observations.

The top surfaces of these models are polygonal tundra shapes and elevations derived from actual LIDAR data sets.
The top surface polygon shapes and elevations are created and provided as input for the meshing.

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. These layers are split into layers within and below the permafrost.
As observed by Joel Rowland referring to the core data from ORL (of 30 cm or less); they have " ... a sequence of an upper organic layer (includes "moss" or live vegation), a mineral layer, then a deeper organic layer. ... the average thickness of the layers were: 11 cm, 11 cm, and 7.5 (biased by one core with a thick lower organic layer)."

The ice wedge shapes follow the tundra polygon shape and have a constant rim width and constant depth to end point. The top of the ice wedge tops start below the permafrost boundary.

Site Images

Area C

Polygon identification numbers and node locations are shown on the image below for the NGEE extensive site-C. Image is provided by Chandana Gangodagamage

Area C 2D polys

Short Description of Each Version

Fine Deep Mesh

V3.2.0_C.1 Mesh (6 layers) :

V3.1 FullVersion 3.2.C.1 runs the Version 3.C.# extending the deep mineral layer (layer 6) to -45 deep. This mesh is 3D based on single polygon #6  generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.2.0_C.2 Mesh (6 layers) :

V3.1 FullVersion 3.2.C.2 runs the Version 3.C.# extending the deep mineral layer (layer 6) to -45 deep. This mesh is 3D based on single polygon #31  generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.2.0_C.3 Mesh (6 layers) :

V3.1 FullVersion 3.2.C.3 runs the Version 3.C.# extending the deep mineral layer (layer 6) to -45 deep. This mesh is 3D based on single polygon #44  generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.2.0_C.4 Mesh (6 layers) :

V3.1 FullVersion 3.2.C.4 runs the Version 3.C.# extending the deep mineral layer (layer 6) to -45 deep. This mesh is 3D based on single polygon #45  generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.2.0_C.5 Mesh (6 layers) :

V3.1 FullVersion 3.2.C.5 runs the Version 3.C.# extending the deep mineral layer (layer 6) to -45 deep. This mesh is 3D based on multiple polygons ##6, 8, 9, 19, 21, 25, 27, 29, 31, 34, 35, 36, 37, 39, 45, 47, 50, 56 generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

Fine Mesh

V3.C.1.1 Mesh (6 layers) :

V3.1 FullVersion 3.C.1.1 runs the Version 3.1 mesh with the polygons of V3.C.1 adding polygon #56. This mesh is 3D based on multiple polygons ##6, 8, 9, 19, 21, 25, 27, 29, 31, 34, 35, 36, 37, 39, 45, 47, 50, 56 generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.C.1 Mesh (6 layers) :

V3.1 FullVersion 3.C.1 runs the Version 3.1 with different number of polygons to create the mesh. This mesh is 3D based on multiple polygons ##6, 8, 9, 19, 21, 25, 27, 29, 31, 34, 35, 36, 37, 39, 45, 47, 50 generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.C.0 Mesh (6 layers) :

V3.1 FullVersion 3.C.1 runs the Version 3.1 with all area C polygons. This mesh is 3D based on polygons generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.1 Mesh (6 layers) :

V3.1 FullVersion 3.1 is a modification of the Version 3 mesh which adds neighboring polygons to the polygon #40. This mesh is 3D based on multiple polygons #32, 40, 42, 43, 49 generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V3.0.2 Mesh (6 layers) with corners:

V3 DetailVersion 3.0.2 is a run of mesh Version 3.0.1 with the polygon #06. No other changes to Version 3.0.1 were made.

V3.0.1 Mesh (6 layers) with corners:

V3 DetailVersion 3.0.1 is a modification of the Version 3.0 mesh which adds corner faces to the exodus file. This version has a correction to file write_exo.lgi and now has two additional layers for corner and top faces. The following are additional faces that were added to the V3.0.0: layer 7 -> corner side faces layer 8 -> corner top faces

V3.0 Mesh (6 layers) :

V3 DetailVersion 3 is a modification of the Version 2 mesh which adds a third mineral layer between upper and lower organic layers. This mesh design will be used for the version 01 with multiple polygons. This mesh is 3D based on single polygon #40 generated using LiDAR data set (area C). This mesh follows the criteria listed in the Mesh Input Parameters below. The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat bottom. The Ice Wedge starts at the top of the mineral layers and is aprox 2.8 meters long. The convention of layer order numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V2.0 Mesh (5 layers) :

V2 DetailVersion 2 is a modification of the Version 1 mesh which is a 3D mesh polygon based on single polygon #40 generated using LiDAR data set (area C). This mesh has changes to V1 based on the Mesh Input Parameters below. It has increased vertical resolution and a flat bottom. The convention of layer order was also changed so that numbering is from top to bottom. Two Exodus II mesh files are written, one multi-material with ice, and one single material.

V1.0 Mesh (prototype):

V1 Full CutThis is prototype 3D mesh of a wedge polygon based on polygon #40 generated using LiDAR data set. Two Exodus II mesh files are written, one multi-material, and one single material.

Test Mesh

Test 1 :

V3.1 Full3D column with flat top. This mesh is 3D based on a polygon generated using 3 points data set.

The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat top and bottom. Bottom is at -1.

The convention of layer order numbering is from top to bottom.

Two Exodus II mesh files are written, one multi-material, and one single material.

Test 2 :

V3.1 Full3D column with flat top. This mesh is 3D based on a polygon generated using 3 points data set.

The mesh has 1 moss layer, 2 organic layers, and 3 mineral layers with a flat top and bottom. Bottom is at -45.

The convention of layer order numbering is from top to bottom.

Two Exodus II mesh files are written, one multi-material, and one single material.

Test 3 :

V3.1 FullSame as 2, but with different coordinates for 3 point data set.

Test 4 :

V3.1 Full3D column with flat top. This mesh is 3D based on a polygon generated using 3 points data set.

Upper organic layer thickness is changed to 0.12 m (6 cells).

Test 5 :

V3.1 FullMoss layer removed. The layer numbering starts from 2 - upper organic layer.

Upper organic layer thickness is changed to 0.10 m (4 cells).

Test 6 :

V3.1 Full3D column with flat top. This mesh is 3D based on a polygon generated using 3 points data set.

Upper organic layer thickness is changed to 0.08 m (4 cells).

Test 7 :

V3.1 FullMoss layer removed. The layer numbering starts from 2 - upper organic layer.

Upper organic layer thickness is changed to 0.06 m (3 cells).

Test 8 :

V3.1 Full3D column with flat top. This mesh is 3D based on a polygon generated using 3 points data set.

Upper organic layer thickness is changed to 0.16 m (8 cells).

Test 9 :

V3.1 FullMoss layer removed. The layer numbering starts from 2 - upper organic layer.

Upper organic layer thickness is changed to 0.14 m (7 cells).




Grid Team Contacts

Carl Gable <gable -at- lanl -dot- gov> 505-665-3533
Terry Miller <tamiller -at- lanl -dot- gov> 505-667-8009
Lucia Short <lucia -at- lanl -dot- gov> 505-665-7957