Data Package Metadata   View Summary

Urban-Rural Temperature Data-relation between land-cover and the Urban Heat Island in San Juan, Puerto Rico

General Information
Data Package:
Local Identifier:knb-lter-luq.167.82
Title:Urban-Rural Temperature Data-relation between land-cover and the Urban Heat Island in San Juan, Puerto Rico
Alternate Identifier:DOI PLACE HOLDER
Abstract:

Our objective in this study is to quantify the UHI created by the San Juan Metropolitan Area over space and time using temperature data collected by mobile and fixed-station measurements. We used the fixed-station measurements to examine the relation between average temperature at a given location and the density of vegetation located upwind. We then regressed temperatures against regional land-cover to predict future temperature with projected land-cover change. Our data show the existence of a nocturnal UHI, with average nighttime urban-rural temperature differences (ΔTU-R) of up to 3.02°C.
Each of the stations listed in this excel file were used to calculate the urban heat island created by the San Juan Metropolitan Area.

Publication Date:2011-06-03
Language:English

Time Period
Begin:
2006-06-26
End:
2006-07-05

People and Organizations
Contact:Murphy, David  [  email ]
Creator:Hall, Charles A.S. 
Associate:Melendez-Colom, Eda (University of Puerto Rico, Rio Piedras Campus, data manager)

Data Entities
Data Table Name:
Summer temperature data
Description:
Summer temperature data
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/167/82/44bedb41f5f3a2c32a3c8eca6b36c968
Name:Summer temperature data
Description:Summer temperature data
Number of Records:2352
Number of Columns:4

Time Period
Begin:
2006-06-26
End:
2006-07-05

Table Structure
Object Name:SummerTemperatureData.csv
Size:66202
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Date of temperature recorded by HOBOTime of observation in 24-hour timeSite abbreviationTemperature as recorded by a HOBO
Column Name:Date  
TIME  
siteAbbreviation  
Temp_C  
Definition:Date when temperature was recorded by a Series-8 HOBO Pro-Temp Data Logger24-hour time when observations were done (hh:mm)Abbreviations corresponding to different sitesTemperature as recorded by the Series-8 HOBO Pro-Temp Data Loggers (Onset Corporation, Pocasset, MA)
Storage Type:date  
date  
string  
 
Measurement Type:dateTimedateTimenominalratio
Measurement Values Domain:
Formatmm/dd/yyyy
Precision
Formathh:mm
Precision
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code1A
DefinitionLocated at the intersection of one large road and one side street. Small trees line the south side of the side street, and also the west side of the large road, but do not limit sky view much. Two large buildings to the southeast and southwest have building road ratios of about 8:1, while the building to the northeast has a ratio of 3:1. Sky view factor of about 68.8%.
Source
Code Definition
Code2A
DefinitionHOBO placed on tree trunk 10 - 20 meters below a full canopy and about 30 meters from the edge of the forest. Broadleaf, climax tree species dominate. Sky view factor is 6.5%;
Source
Code Definition
Code3A
DefinitionThis site is located 15 meters south of the old growth forest. There is a field of short grass species to the east, and an industrial complex directly to the west. Sky view factor greater than 50%, with a building road ratio of 1:1;
Source
Code Definition
Code4A
DefinitionHOBO placed at the northern end of a residential neighborhood. The area due east and northeast is wild grassland with sparse tree coverage for +5 Km upwind. Housing structures about 100 meters south. Placed near one short tree (about 4 meters high). Sky view factor greater than 75%
Source
Code Definition
Code1S
DefinitionThickly vegetated fields with multiple types of long grass species. Few trees present. Sky view factor greater than 75%. No buildings. One single-lane asphalt road;
Source
Code Definition
Code2S
DefinitionIntersection of two single-lane old asphalt roads. Buildings on three of four corners, with a building road ratio of about 1:1, with one larger church steeple, at a building road ratio of 2:1. Sky view factor greater than 50%;
Source
Code Definition
Code3S
Definitionless than 500 meters downwind of a major pharmaceutical plant. A single one-story building near sensor. Mainly grass and bushy vegetation surrounding nearby building. Sky view factor greater than 75%. Building-road ratio around 1:1.
Source
Code Definition
Code5S
DefinitionIntersection of two four-lane roads. Car traffic extremely high during rush hours. Two-story mall located 300 meters southeast, and an industrial complex located 400 meters northeast. Sky view factor greater than 50%. Buildings too far for a building road ratio.
Source
Code Definition
Code6S
DefinitionMowed grassland located approx. 200 meters south of a major shopping center, and about 50 meters south of the parking lot for the shopping center. Vegetated hills to the east and south, about 30 meters in height, and covered approximately 30% by trees. Sky view factor of 82.5%.
Source
Unitcelsius
Precision0.5
Typereal
Missing Value Code:  
Codenone
ExplMissing Value
   
Accuracy Report:        
Accuracy Assessment:        
Coverage:        
Methods:        

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LTER Network Data Access Policy, Data Access Requirements, and General Data Use Agreement
approved by the LTER Coordinating Committee April 6, 2005

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The consumer of these data (“Data User” herein) has an ethical obligation to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or coauthorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available “as is.” The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.
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Keywords

By Thesaurus:
Core Areasdisturbance
LTER Controlled Vocabularymeasurements, atmospheric properties, climate, weather, physical properties, temperature, air temperature

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

The overall goal of the fixed-station transects was to establish simultaneous temperature measurements to assess the timing of the peak diurnal and seasonal UHI and the influence of land-cover on temperature. The fixed-station measurements consisted of a network of ten automated Series-8 HOBO Pro-Temp Data Loggers (Onset Corporation, Pocasset, MA), calibrated to each other and to the ASOS temperature sensor at San Juan airport, to record temperature measurements near different types of land-cover ranging from the center of San Juan to barely developed regions 20 km to the east of the city center. We attached the HOBO sensors to telephone poles about 3 meters above the ground surface. The sensors were all placed within 50 meters of sea level, so elevation should not influence our results. Air temperature measurements were logged automatically at 5 minute intervals, and then aggregated into hourly averages for data analysis. We did not measure humidity because temperature was the primary focus of this study and because the atmospheric controls on humidity are varied and different than that for temperature. The HOBO temperature loggers had internal sensors that, according to the manufacturer's specifications, have a 90% response time in still air of up to 35 minutes and an accuracy of ±0.2°C over the range of temperatures measured in Puerto Rico. The error would be larger if radiation errors were present, but we placed the loggers in naturally ventilated radiation shields provided by Onset specifically to reduce radiation-caused error. Temperature measurements collected during calibration exercises performed in a laboratory resulted in an average standard deviation among all sensors of 0.11°C.

People and Organizations

Creators:
Individual: Charles A.S. Hall
Address:
SUNY College of Environmental Sciences and Forestry, Illick Hall,
Syracuse, NY 13210 US
Phone:
(315) 470-6870 (voice)
Phone:
(315) 470-6934 (facsimile)
Email Address:
chall@lternet.edu
Web Address:
http://www.esf.edu/EFB/hall/
Contacts:
Individual: David Murphy
Address:
US
Phone:
(315) 412-4619 (voice)
Email Address:
dmurphy@lternet.edu
Associated Parties:
Individual: Eda Melendez-Colom
Organization:University of Puerto Rico, Rio Piedras Campus
Address:
University of Puerto Rico at Rio Piedras, Ponce de Leon Ave.,
San Juan, PR 00931 US
Phone:
(787) 764-0000 (voice)
Email Address:
edacorreo@yahoo.com
Role:data manager

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
2006-06-26
End:
2006-07-05
Sampling Site: 
Description:514-534 Calle Benavente San Juan, 00926, Puerto Rico ‎ 49 m NW. Thickly vegetated fields with multiple types of long grass species. Few trees present. Sky view factor greater than 75%. No buildings. One single-lane asphalt road.
Site Coordinates:
Longitude (degree): -66.0438Latitude (degree): 18.3725
Altitude (meter):49
Sampling Site: 
Description:Calle 30, Carolina, 00987, Puerto Rico ‎ 23 m S. Intersection of two single-lane old asphalt roads. Buildings on three of four corners, with a building road ratio of about 1:1, with one larger church steeple, at a building road ratio of 2:1. Sky view factor greater than 50%.
Site Coordinates:
Longitude (degree): -65.9886Latitude (degree): 18.3701
Altitude (meter):38
Sampling Site: 
Description:Puerto Rico 858, Carolina, 00987, Puerto Rico ‎ 28 m S. Less than 500 meters downwind of a major pharmaceutical plant. A single one-story building near sensor. Mainly grass and bushy vegetation surrounding nearby building. Sky view factor greater than 75%. Building-road ratio around 1:1
Site Coordinates:
Longitude (degree): -65.9606Latitude (degree): 18.3672
Altitude (meter):12
Sampling Site: 
Description:PR-962 Canovanas, 00729, Puerto Rico ‎ 19 m E. Hobo was placed on a one-lane road bisecting two neighborhoods, one directly east and one directly west. Building-road ratio of about 1:1, and a sky view factor >50%.
Site Coordinates:
Longitude (degree): -65.8922Latitude (degree): 18.3623
Altitude (meter):21
Sampling Site: 
Description:Calle 6, Trujillo Alto, 00976, Puerto Rico ‎ 156 m NW. Intersection of two four-lane roads. Car traffic extremely high during rush hours. Two-story mall located 300 meters southeast, and an industrial complex located 400 meters northeast. Sky view factor greater than 50%. Buildings too far for a building road ratio.
Site Coordinates:
Longitude (degree): -66.0188Latitude (degree): 18.3701
Altitude (meter):59
Sampling Site: 
Description:Puerto Rico 857, Carolina, 00987, Puerto Rico ‎ 89 m N. Mowed grassland located approximately 200 meters south of a major shopping center, and about 50 meters south of the parking lot for the shopping center. Vegetated hills to the east and south, about 30 meters in height, and covered approximately 30% by trees. Sky view factor of 82.5%.
Site Coordinates:
Longitude (degree): -65.9301Latitude (degree): 18.369
Altitude (meter):22
Sampling Site: 
Description:752-760 Calle 14 Rio Grande, Río Grande 00745, Puerto Rico ‎ 0.9 m N. Located at the intersection of one large road and one side street. Small trees line the south side of the side street, and also the west side of the large road, but do not limit sky view much. Two large buildings to the southeast and southwest have building road ratios of about 8:1, while the building to the northeast has a ratio of 3:1. Sky view factor of about 68.8%
Site Coordinates:
Longitude (degree): -65.8497Latitude (degree): 18.3791
Altitude (meter):8
Sampling Site: 
Description:253-273 Avenida D, San Juan, 00901, Puerto Rico ‎ 21 m S. tree trunk 10 - 20 meters below a full canopy and about 30 meters from the edge of the forest. Broadleaf, climax tree species dominate. Sky view factor is 6.5%.
Site Coordinates:
Longitude (degree): -66.0481Latitude (degree): 18.4292
Altitude (meter):1
Sampling Site: 
Description:1360-1372 Calle San Ignacio, San Juan, 00921, Puerto Rico ‎ 28 m W. This site is located 15 meters south of the old growth forest. There is a field of short grass species to the east, and an industrial complex directly to the west. Sky view factor greater than 50%, with a building road ratio of 1:1
Site Coordinates:
Longitude (degree): -66.0924Latitude (degree): 18.3859
Altitude (meter):49
Sampling Site: 
Description:Calle Principal Toa Baja, 00949, Puerto Rico ‎ 27 m NW. Northern end of a residential neighborhood. The area due east and northeast is wild grassland with sparse tree coverage for +5 Km upwind. Housing structures about 100 meters south. Placed near one short tree (about 4 meters high). Sky view factor greater than 75%
Site Coordinates:
Longitude (degree): -66.245Latitude (degree): 18.4197
Altitude (meter):10

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Summer temperature data


Time Period
Begin:
2006-06-26
End:
2006-07-05

Project

Other Metadata

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

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