Results

Overall Results

SR vs. AT MapThe correlations between solar radiation and air temperature ranged from approximately 0.07 to 0.45. The lowest value of 0.06529 was observed at Bearwallow Mountain (BEAR) in Henderson County, while the highest value of 0.45782 was observed at Siler City Airport (SILR) in Chatham County. Most of the correlations for each ECONET station ranged from 0.31 to 0.4. Aside from SILR, a few other stations did observe correlations ranging from 0.41 to 0.5. Those stations are: UNCG - Lindale Farm Station (HIGH) in Guilford County, Mountain Horticultural Crops Research Station (FLET) in Henderson County, Mountain Research Station (WAYN) in Haywood County, and Border Belt Tobacco Research Station (WHIT) in Columbus County.

 

 

 

 

 

 

 

SR vs. RH Map

The correlation between solar radiation and relative humidity ranged from approximately -0.2 to -0.6. The value of -0.19909, which indicated the least amount of correlation for any of the ECONET stations, was observed at Reedy Creek Field Laboratory (REED) in Wake County. The value of -0.60407, which indicated the most amount of correlation, was observed at Horticultural Crops Research Station (CAST) in New Hanover County. Most of the correlations for each ECONET station was less than -0.5. Between the three parameters of air temperature, relative humidity, and soil temperature, relative humidity correlations were the best overall.

 

 

 

 

 

 

 

 

 

SRvsST_Map.pngThe correlation between solar radiation and soil temperature range from approximately 0.04 to 0.22. The lowest value of 0.04256 was observed at Cunningham Research Station (KINS) in Lenoir County. The highest value of 0.22545 was observed at Siler City Airport (SILR) in Chatham County. Most of the correlations for each ECONET station were between 0.11 and 0.2. In addition to SILR, Mountain Horticultural Crops Research Station (FLET) in Henderson County also observed a "higher" correlation of about 0.2. In addition to KINS, Piedmont Research Station (SALI) in Rowan County observed a lower correlation of about 0.09.

 

 

 

 

 

 

 

From looking at the statewide maps above, it appears that the solar radiation correlations between air temperature and relative humidity are generally better in the Coastal Plain region of North Carolina. While more research is needed, it's a possibility that elevation is somehow influencing the stations in the western half of the state. This could be caused by the fact that the mountains can generate more cloud cover through orographic lifting (mountains force air to rise, which cools, condenses, and forms clouds), which ultimately would affect the air temperature and relative humidity measurements.

 

 

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Table of Correlations

Below is a table of correlation values for each of the ECONET stations we used in our study, as well as the average correlations overall.

 

Station ID

SR vs. AT Correlations

SR vs. RH Correlations

SR vs. ST Correlations

AURO

0.361615442

-0.519552319

0.192193497

CAST

0.386341331

-0.604075583

0.180199277

CLAY

0.386849856

-0.501788058

0.184158596

CLIN

0.392208987

-0.573749688

0.198887956

FLET

0.413530043

-0.555591717

0.206633932

WINE

0.326979541

-0.363881291

0.137034849

BEAR

0.065297552

-0.225233193

0.13170163

HIGH

0.423083531

-0.53493691

0.154955398

JACK

0.374799495

-0.477421104

0.178231778

KINS

0.380183392

-0.579642705

0.042562192

LAUR

0.369579385

-0.458418237

0.155293796

LEWS

0.320682054

-0.55244936

0.166707432

OXFO

0.369889205

-0.492004174

0.185575525

LAKE

0.392010245

-0.52346541

0.195622157

REED

0.221200495

-0.199090988

0.110920782

REID

0.370666792

-0.349482281

0.157318024

ROCK

0.394080442

-0.568428305

0.189741454

SALI

0.37050461

-0.510942845

0.092063132

SILR

0.457821753

-0.571011295

0.225453179

WAYN

0.42933264

-0.540213214

0.135251925

WHIT

0.403286249

-0.596006046

0.128218108

WILL

0.377161349

-0.516318116

0.171923487

Average

0.363050199

-0.491531947

0.160029459

 

 

 

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Introduction

Procedure

Station Data and Analysis

Results

Conclusions and Future Work