Benchmark Climates

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  • Overview +


    It is not practical to determine the weathering characteristics of materials in all of the world's climates. Therefore, benchmark climates selected for exposure testing are based on their known severity for the weathering of materials and the anticipated market of the product. The major marketing area of the materials should be taken into consideration when selecting suitable climates and sites for weathering tests.

  • Sub-Tropical +




    For over 75 years, the Miami region of southern Florida has been a benchmark for outdoor testing of material's durability. High levels of ultraviolet radiation, humidity and temperature combine to provide a subtropical environment widely specified for outdoor exposure testing. Companies worldwide use Atlas' outdoor exposure site for exposure testing of paints, coatings, textiles, plastics and other various products.

    Atlas utilizes the latest technology in weather reporting instrumentation, such as total solar (Ultraviolet, Visible and Infrared), total UV and narrow-band UV radiometers and pyrheliometers. Both sites also employ instruments for monitoring ambient temperature and humidity, rainfall, total wet-time and wind speed. All instruments are directly traceable to national and international standards, including the World Radiometric Reference (WRR) and the National Institute of Standards and Technology (NIST).

    Florida

    Local informations

    Location:

    Latitude

    25° 52' North

    Longitude

    80° 27' West

    Elevation

    3 meters (10 ft)

    Distance From Ocean

    27 km (17 miles)

    Temperature:

    Average High

    34°C / 93°F (Summer), 26°C / 79°F (Winter)

    Average Low

    23°C / 73°F (Summer), 13°C / 55°F (Winter)

    Relative Humidity:

    Annual Mean

    78%

    Annual Precipitation (Rain)

    1685 mm / 66 inches

    Solar Radiant Exposure*:

    Total 6588 MJ/m2
    UV 280 MJ/m2
    *Radiant Exposure measured at latitude tilt angle (26° South)

    Av. Monthly UV and Total Radiant Exposure for Southern Florida (MJ/m2)

    YEARLY TOTAL

    MONTH

    UV*

    TOTAL

    January

    20.0

    505

    February

    22.5

    545

    March

    26.5

    545

    April

    28.0

    612

    May

    28.0

    609

    June

    25.7

    543

    July

    24.7

    532

    August

    24.0

    543

    September

    22.3

    540

    October

    21.7

    555

    November

    18.0

    490

    December

    18.6

    496

    YEARLY TOTAL 280.0 6588
  • Desert +


    Along with southern Florida, Arizona has long been considered a benchmark for outdoor exposure testing. Both sites, possess high levels of solar radiation and elevated temperatures, two crucial factors in weathering processes. Unlike southern Florida, however, Arizona has low relative humidity (approximately 30%) that can have a distinct effect on materials durability.

    Atlas' Arizona desert site is located at approximately 50km (30mi) north of metropolitan Phoenix in an unpolluted environment. Since 1948, DSET has offered desert exposure testing suitable for materials used in a wide range of industries, including automotive, construction and consumer products.

    Arizona

    Local informations

    Latitude

    33° 54' North

    Longitude

    112° 08' West

    Elevation

    610 meters (2000 ft)

    Temperature:

     

    Average High

    39°C / 102°F (Summer), 24°C / 75°F (Winter)

    Average Low

    20°C / 68°F (Summer), 8°C / 46°F (Winter)

    Relative Humidity:

     

    Annual Mean

    37%

    Annual Precipitation (Rain)

    255 mm / 10 inches

    Solar Radiant Exposure*:

     

    Total

    8004 MJ/m2

    UV

    334 MJ/m2

    * Radiant Exposure measured at latitude titl angle (34° South)

    Av. Monthly UV and Total Radiant Exposure for Central Arizona (MJ/m2)

    MONTH

    UV*

    TOTAL

    January

    20.1

    490

    February

    19.8

    546

    March

    24.7

    633

    April

    33.3

    755

    May

    38.6

    786

    June

    36.8

    770

    July

    35.1

    745

    August

    32.5

    756

    September

    29.3

    711

    October

    25.8

    705

    November

    19.2

    582

    December

    18.3

    525

    YEARLY TOTAL

    333.5

    8004

  • Mediterranian +


    The Bandol region of France possesses a typical Mediterranean climate. With 3,000 hours of sunlight per year, an elevation of 110 m (361 ft), average wet time of 2,700 hours and a proximity to the Mediterranean Sea of only 4 km, the site is used by many European companies to test a wide range of materials.


    Sanary, France

    Local informations

    Location:

     

    Latitude

    43° 08' North

    Longitude

    5° 49' East

    Elevation

    110 meters

    Temperature:

     

    Annual Avg. Temperature

    13° C (55° F)

    Relative Humidity:

     

    Avg. Relative Humidity

    76%

    Total Rain

    700 mm

    Solar Radiant Exposure*:

    Total UV 295-385 nm

    382.4 MJ/m2*

    Total Radiant Energy 295-3000 nm

    5500 MJ/m2

    *Data measured from 300-400 nm