| Summary Information |
| Warming-El Nino-Nitrogen Deposition Experiment (WENNDEx): Meteorology Data (4/30/2007
- 8/5/2009)
|
| Creator: |
| Individual: |
Scott Collins |
| Physical Address: |
| Delivery Address: |
Department of Biology, MSC03 2020, 1 University of New Mexico |
| City: |
Albuquerque |
| Locality: |
NM |
| Postal Code: |
87131 |
| Phone: |
US |
|
| Email: |
scollins@sevilleta.unm.edu |
|
| Metadata Provider: |
| Individual: |
Information Manager Sevilleta LTER |
| Physical Address: |
| Delivery Address: |
1 University of New Mexico |
| City: |
Albuquerque |
| Postal Code: |
87131 |
| Phone: |
US |
|
| Phone: |
(505) 277-2109 |
| Phone: |
(505) 277.5355 |
| Email: |
data-use@sevilleta.unm.edu |
|
| Publication Date: |
2012-02-08 |
| Language: |
English |
| Abstract: |
| Humans are creating significant global environmental change, including shifts in climate,
increased nitrogen (N) deposition, and the facilitation of species invasions. A multi-factorial
field experiment is being performed in an arid grassland within the Sevilleta National
Wildlife Refuge (NWR) to simulate increased nighttime temperature, higher N deposition,
and heightened El Niño frequency (which increases winter precipitation by an average
of 50%). The purpose of the experiment is to better understand the potential effects
of environmental change on grassland community composition and the growth of introduced
creosote seeds and seedlings. The focus is on the response of three dominant species,
all of which are near their range margins and thus may be particularly susceptible
to environmental change. It is hypothesized that warmer summer temperatures and increased
evaporation will favor growth of black grama (Bouteloua eriopoda), a desert grass,
but that increased winter precipitation and/or available nitrogen will favor the growth
of blue grama (Bouteloua gracilis), a shortgrass prairie species. Treatment effects
on limiting resources (soil moisture, nitrogen mineralization, precipitation), species
growth (photosynthetic rates, creosote shoot elongation), species abundance, and net
primary production (NPP) are all being measured to determine the interactive effects
of key global change drivers on arid grassland plant community dynamics.
|
|
|
| Keywords: |
| Keyword: |
inorganic nutrients |
| Keyword Thesaurus: |
Core Areas |
|
| Keywords: |
| Keyword: |
plant communities |
| Keyword: |
species |
| Keyword: |
meteorology |
| Keyword: |
climate change |
| Keyword: |
climate |
| Keyword: |
weather |
| Keyword: |
wind |
| Keyword: |
precipitation |
| Keyword: |
precipitation |
| Keyword: |
air temperature |
| Keyword: |
radiation |
| Keyword: |
light |
| Keyword: |
precipitation |
| Keyword: |
precipitation |
| Keyword: |
deserts |
| Keyword: |
grasslands |
| Keyword: |
grasses |
| Keyword: |
forbs |
| Keyword Thesaurus: |
LTER Controlled Vocabulary |
|
| Intellectual Rights: |
| Data Policies |
| This dataset is released to the public and may be freely downloaded. Please keep the
designated contact person informed of any plans to use the dataset. Consultation or
collaboration with the original investigators is strongly encouraged. Publications
and data products that make use of the dataset must include proper acknowledgement
of the Sevilleta LTER. A copy of any publications using these data must be supplied
to the Sevilleta LTER Information Manager.
|
|
|
| Distribution: |
| Online: |
| URL: |
http://sev.lternet.edu/data/sev-258 |
|
|
| Coverage: |
| Geographic Goverage: |
| Geographic Description: |
Deep Well is located on McKenzie Flats and is site of the longest running SEV LTER
met station, number 40, which has been active since 1988. In addition to studies
of meteorological variables, core line-intercept vegetation transects and line-intercept
transects from the 1995 & 2001 Deep Well fires are sampled here. The mini-rhizotron
study, blue and black grama compositional comparison, blue and black grama patch dynamics
investigation, and kangaroo rat population assessement are all ongoing here. Deep
Well Blue/Black Grama Mixed is also the location of the warming and monsoon experiments,
as well as portions of the line-intercept and vegetation removal studies. On August
4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge.
By August 5, 2009, the fire had reached the area of Deep Well Blue/Black Grama Mixed.
While portions of this site were burned, the entirety was not. See individual projects
for further information on the effects of the fire.
|
| Bounding Coordinates: |
| West Bounding Coordinates: |
-106.688 |
| East Bounding Coordinates: |
-106.688 |
| North Bounding Coordinates: |
34.3591 |
| South Bounding Coordinates: |
34.3591 |
| Bounding Altitude: |
| Altitude Minimum: |
1600 |
| Altitude Maximum: |
1600 |
| Altitude Units: |
meter |
|
|
|
| Geographic Goverage: |
| Geographic Description: |
The Warming site is located just to the northeast of the Deep Well meteorological
station. The site can best be accessed by parking on the main road next to signs for
Deep Well and the mini-rhizotron study. Note that vehicles are not permitted on the
road to the Deep Well meteorological station. Travel on foot towards Deep Well and
look for a well-trod path to the northwest shortly before the meteorological station.
For plot maps, see power point slides in the on-line Sevilleta LTER WIKI page. On
August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife
Refuge. By August 5, 2009, the fire had reached the Warming site, which was burned
extensively though not entirely. Approximately 50% of plots burned on August 5 and
those plots which did not burn were burned within three weeks by US Fish and Wildlife.
Thus, the condition of all plots at the Warming site was comparable by early September
2009.
|
| Bounding Coordinates: |
| West Bounding Coordinates: |
-106.691 |
| East Bounding Coordinates: |
-106.691 |
| North Bounding Coordinates: |
34.3595 |
| South Bounding Coordinates: |
34.3595 |
|
|
| Temporal Coverage: |
| Date Range: |
| Begin Date: |
| Calendar Date: |
2007-04-30 |
|
| End Date: |
| Calendar Date: |
2009-08-09 |
|
|
|
|
| Contact: |
| Position Title: |
Information Manager |
| Organization: |
LTER Network Office |
| Physical Address: |
| Delivery Address: |
UNM Biology Department, MSC03-2020 |
| Delivery Address: |
1 University of New Mexico |
| City: |
Albuquerque |
| Locality: |
NM |
| Postal Code: |
87131-0001 |
| Phone: |
USA |
|
| Phone: |
505 277-2535 |
| Phone: |
505 277-2541 |
| Email: |
tech-support@lternet.edu |
| URL: |
http://www.lternet.edu |
|
| Contact: |
| Individual: |
Sevilleta Information Manager |
| Organization: |
Sevilleta LTER |
| Physical Address: |
| Phone: |
US |
|
| Email: |
data-use@sevilleta.unm.edu |
|
| Publisher: |
| Individual: |
Information Manager Sevilleta LTER |
| Physical Address: |
| Delivery Address: |
1 University of New Mexico |
| City: |
Albuquerque |
| Postal Code: |
87131 |
| Phone: |
US |
|
| Phone: |
(505) 277-2109 |
| Phone: |
(505) 277.5355 |
| Email: |
data-use@sevilleta.unm.edu |
|
| Publication Place: |
Sevilleta LTER |
| Method Step: |
| Description: |
| Experimental Design Our experimental design consists of three fully crossed factors
(warming, increased winter precipitation, and N addition) in a completely randomized
design, for a total of eight treatment combinations, with five replicates of each
treatment combination, for a total of 40 plots. Each plot is 3 x 3.5 m. All plots
contain B. eriopoda, B. gracilis and G. sarothrae. Our nighttime warming treatment
is imposed using lightweight aluminum fabric shelters (mounted on rollers similar
to a window shade) that are drawn across the warming plots each night to trap outgoing
longwave radiation. The dataloggers controlling shelter movements are programmed to
retract the shelters on nights when wind speeds exceed a threshold value (to prevent
damage to shelters) and when rain is detected by a rain gauge or snow is detected
by a leaf wetness sensor (to prevent an unintended rainout effect). Each winter we
impose an El Nino-like rainfall regime (50% increase over long-term average for non-El
Nino years) using an irrigation system and RO water. El Nino rains are added in 6
experimental storm events that mimic actual El Nino winter-storm event size and frequency.
During El Nino years we use ambient rainfall and do not impose experimental rainfall
events. For N deposition, we add 2.0 g m-2 y-1 of N in the form of NH4NO3 because
NH4 and NO3 contribute approximately equally to N deposition at SNWR (57% NH4 and
43% NO3; Bez et al., 2007). The NH4NO3 is dissolved in 12 liters of deionized water,
equivalent to a 1 mm rainfall event, and applied with a backpack sprayer prior to
the summer monsoon. Control plots receive the same amount of deionized water.
|
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|
| Data Table: |
| Entity Name: |
sev258_warmingmet_03012012.txt |
| Entity Description: |
Data for SEV 258. |
| Object Name: |
sev258_warmingmet_20130124.txt |
| Size: |
4393857 |
| Data Format: |
| Text Format: |
| Number of Header Lines: |
1 |
| Number of Footer Lines: |
0 |
| Record Delimiter: |
\r\n |
| Attribute Orientation: |
column |
| Simple Delimited: |
| Field Delimiter: |
, |
|
|
|
| Distribution: |
| Online: |
| URL: |
https://pasta.lternet.edu/package/data/eml/knb-lter-sev/258/137262/07ce5f07c61a89f3662e6cb3b22a8392 |
|
|
| Coverage: |
| Temporal Coverage: |
| Date Range: |
| Begin Date: |
| Calendar Date: |
2007-04-30 |
|
| End Date: |
| Calendar Date: |
2009-08-05 |
|
|
|
|
| Attribute List: |
| Attribute Name: |
timestamp |
| Attribute Label: |
timestamp |
| Attribute Definition: |
time recorded by Campbell datalogger when observation was collected |
| Storage Type: |
date |
| Measurement Scale: |
| Datetime: |
| Format String: |
YYYYMMDDhhmmss |
|
|
| Attribute Name: |
date |
| Attribute Label: |
date |
| Attribute Definition: |
date and time as recorded by Campbell datalogger |
| Storage Type: |
date |
| Measurement Scale: |
| Datetime: |
| Format String: |
MM/DD/YYThh:mm:ss |
|
|
| Attribute Name: |
precip |
| Attribute Label: |
precip |
| Attribute Definition: |
Total amount of precipitation in a 15 minute interval |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Standard Unit: |
millimeter |
| Precision: |
0.1 |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
50 |
|
|
|
|
| Attribute Name: |
precip_flag |
| Attribute Label: |
precip_flag |
| Attribute Definition: |
Quality control flag for precip data |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Enumerated Domain: |
| Code Definition: |
| Code: |
Q |
| Definition: |
questionable |
|
|
|
|
|
| Attribute Name: |
light_avg |
| Attribute Label: |
light_avg |
| Attribute Definition: |
Average amount of light measured during 15 minute interval |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
wattPerMeterSquared |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
1500 |
|
|
|
|
| Attribute Name: |
light_flag |
| Attribute Label: |
light_flag |
| Attribute Definition: |
QC flag for light data |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Enumerated Domain: |
| Code Definition: |
| Code: |
Q |
| Definition: |
questionable |
|
|
|
|
|
| Attribute Name: |
wind_avg |
| Attribute Label: |
wind_avg |
| Attribute Definition: |
Average wind speed during a 15 minute interval |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
meterPerSecond |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
35 |
|
|
|
|
| Attribute Name: |
wind_flag |
| Attribute Label: |
wind_flag |
| Attribute Definition: |
QC flag for wind variable |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Enumerated Domain: |
| Code Definition: |
| Code: |
Q |
| Definition: |
questionable |
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