Rhizosphere, surface, and air temperature patterns at parking lots in Phoenix, Arizona, U.S

Sarah B. Celestian, Chris Martin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Parking lot landscape surfaces can affect thermal microenvironments where parking lot trees grow. We studied temperatures at parking lots in Phoenix, Arizona, U.S. with expansive asphalt paving surrounding narrow parking lot landscape medians covered with decomposing granite rock (DG) mulch and also within adjoining landscaped areas covered with turfgrass or DG mulch. We recorded temperatures at two Phoenix residential landscapes that were covered with either turfgrass or DG mulch and one remnant Sonoran Desert site in the city that had a bare soil surface. Rhizosphere [30 cm (12 in.) depth] temperatures were seasonally highest under asphalt and lowest under turfgrass, and occurred 4 to 8 hr after highest air temperatures. Rhizosphere temperatures under asphalt as close as 1 m (3.3 ft) from parking lot landscape medians were above 40°C (105°F) long enough to damage any tree roots growing outside of landscape medians. Ground surface temperatures were also highest for asphalt and lowest for turfgrass, but surface temperature patterns more closely followed patterns of insolation intensity rather than air temperature. These data show that supraoptimal rhizosphere temperatures around narrow parking lot landscape medians might be one important reason why parking lot trees in the desert Southwest grow poorly when compared with trees away from asphalt surfaces.

Original languageEnglish (US)
Pages (from-to)245-252
Number of pages8
JournalJournal of Arboriculture
Volume30
Issue number4
StatePublished - Jul 2004

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bitumen
parking
surface temperature
rhizosphere
air temperature
asphalt
turf grasses
granite
mulch
rocks
temperature
tree damage
desert
Sonoran Desert
rock
bare soil
insolation
deserts
solar radiation
soil surface

Keywords

  • Asphalt
  • Commercial
  • Landscape
  • Thermal environment
  • Turfgrass
  • Urban

ASJC Scopus subject areas

  • Ecology
  • Forestry

Cite this

Rhizosphere, surface, and air temperature patterns at parking lots in Phoenix, Arizona, U.S. / Celestian, Sarah B.; Martin, Chris.

In: Journal of Arboriculture, Vol. 30, No. 4, 07.2004, p. 245-252.

Research output: Contribution to journalArticle

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