Tower_team:
PI:	Ankur Desai desai@aos.wisc.edu - University of Wisconsin Madison
FluxContact:	David Reed david.edwin.reed@gmail.com -
DataManager:	Jonathan Thom jthom@ssec.wisc.edu -
Lat, Long:	43.0896, -89.4158
Elevation(m):	260
Network Affiliations:	AmeriFlux
Vegetation IGBP:	WAT (Water Bodies : Oceans, seas, lakes, reservoirs, and rivers. Can be either fresh or salt- water bodies.)
Climate Koeppen:	Dfa (Humid Continental: humid with severe winter, no dry season, hot summer)
Mean Annual Temp (°C):	7.94
Mean Annual Precip. (mm):	875
Flux Species Measured:	CO2, H, H2O
Years Data Collected:	2016 - Present
Years Data Available:	AmeriFlux BASE 2016 - 2022 Data Citation AmeriFlux FLUXNET 2016 - 2022 Data Citation
Data Use Policy:	AmeriFlux CC-BY-4.0 Policy¹
Description:	The site is located on the shoreline of Lake Mendota on the rooftop of UW-Madison's Center for Limnology.
URL:	http://flux.aos.wisc.edu/data/
Research Topics:	Lake/Atmosphere flux study
Acknowledgment:	—

Site Tasks

Add Image Add Publication Download Data Add to Site Set

Site Set Select Add Site to Set Cancel Manage Site Sets

This site’s data can also be used under the more restrictive AmeriFlux Legacy Policy.
The AmeriFlux Legacy Policy must be followed if this site’s data are combined with data from sites that require the AmeriFlux Legacy Policy.

US-Pnp

To navigate, press the arrow keys.

Site Photo More Site Images

Image Credit: David Reed, 2016
Copyright preference: As long as credit is given

Site Publication More Site Publications

Use the information below for citation of this site. See the Data Policy page for more details.

DOI(s) for citing US-Pnp data

Data Use Policy: AmeriFlux CC-BY-4.0 License

This site’s data can also be used under the more restrictive AmeriFlux Legacy Policy.
The AmeriFlux Legacy Policy must be followed if US-Pnp data are combined with data from sites that require the AmeriFlux Legacy Policy.

AmeriFlux BASE: https://doi.org/10.17190/AMF/1433376
Citation: Ankur Desai (2023), AmeriFlux BASE US-Pnp Lake Mendota, Picnic Point Site, Ver. 8-5, AmeriFlux AMP, (Dataset). https://doi.org/10.17190/AMF/1433376
AmeriFlux FLUXNET: https://doi.org/10.17190/AMF/2229386
Citation: Ankur Desai (2024), AmeriFlux FLUXNET-1F US-Pnp Lake Mendota, Picnic Point Site, Ver. 4-6, AmeriFlux AMP, (Dataset). https://doi.org/10.17190/AMF/2229386

Find global FLUXNET datasets, like FLUXNET2015 and FLUXNET-CH4, and their citation information at fluxnet.org.

To cite BADM when downloaded on their own, use the publications below for citing site characterization. When using BADM that are downloaded with AmeriFlux BASE and AmeriFlux FLUXNET products, use the DOI citation for the associated data product.

Publication(s) for citing site characterization

—

Acknowledgments

—

Resources

AmeriFlux Logos & Acknowledgments

This page displays the list of downloads of data for the site US-Pnp.

Note: Results are the number of downloads to distinct data users. The Download Count column indicates the number of times the data user downloaded the data. The Version column refers to the version of the data product for the site that was downloaded by the data user.

Year Range

Showing 0 to 0 of 0 results

Products :

All

Site Team View

Items Per Page:

Date	Name	Data Product	Version	Intended Use	Intended Use Description	Download Count

Date	Name	Data Product	Vers.	Intended Use	Intended Use Description	Download Count

Showing 0 to 0 of 0 results

Items Per Page:

Not Found

Uh Oh. Something is missing. Try double checking the URL and try again.

Search Images for this Site Images found : 2

AmeriFlux Images

Add Image

All Only Photos Only Data-Rich Images

Picnic Point tower
**Description:**
View from top of tower
Keywords: lake flux tower
**Credit:** David Reed
**Site ID:** US-Pnp
**Location:** United States
**Image Date:** 2016
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** As long as credit is given

View in Original Size
To download, right-click photo (Mac: control-click) and choose Save Image As

Picnic Point from below
**Description:**
Looking up at tower installation
Keywords: —
**Credit:** Jonathan Thom
**Site ID:** US-Pnp
**Location:** United States
**Image Date:** 2016
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** As long as credit is given

View in Original Size
To download, right-click photo (Mac: control-click) and choose Save Image As

MODIS NDVI

The time series shows the 16-day Normalized Difference Vegetation Index (NDVI) average from the MOD13Q1 data product.
Use the slider below the time series to zoom in and out.

Includes all pixels that have acceptable quality

To view / download these data and other MOD13Q1 products for this site, visit MODIS/Terra Vegetation Indices.

For other related products, visit MODIS/VIIRS Fixed Sites Subsets Tool.

Citation:

ORNL DAAC. 2018. Terrestrial Ecology Subsetting & Visualization Services (TESViS) Fixed Sites Subsets. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1567

Read more on how to cite these MODIS products. Data come from NASA’s MODIS instruments installed on satellites Terra and Aqua, which scan the entire Earth’s surface every one to two days.

MODIS NDVI subsetted data is not yet available for this site.

For a complete list of AmeriFlux sites, visit ORNL DAAC's MODIS/VIIRS Fixed Sites Subsets Tool.

PhenoCam Images and Derived Time Series Data

PhenoCams are high-resolution digital cameras that take repeated images of studied ecosystems and provide quantitative information about the canopy phenology. The PhenoCam Network coordinates the camera installation and data reporting/analyses across sites in the Americas, providing automated, near-surface remote sensing of canopy phenology across a range of ecosystems and climate zones. Use of PhenoCam images / data should follow the PhenoCam Data Use Policy .

No PhenoCam data for this site

GeoNEX Data Products

GeoNEX led by NASA Earth eXchange (NEX) is a collaborative effort for generating Earth monitoring products from the new generation of geostationary satellite sensors. GeoNEX has produced a suite of geostationary data products including surface reflectance, land surface temperature, surface solar radiation, and many others.

The GeoNEX Common Grid locates GeoNEX data in the geographic (latitude/longitude) projection. Pixels (grid cells) are created at regular 0.005°, 0.01°, and 0.02° resolutions.

GeoNEX pixels below cover the area 0.06° x 0.06° around and including site US-Pnp, 43.0896, -89.4158.

Click a square in the grid at left to display its data below.

Coordinates for selected GeoNEX Pixel

Lat: 43.1100 Long: -89.4400

US-Pnp

Graph controls:

Zoom: click-drag
Pan: shift-click-drag
Restore zoom level: double-click
Use the slider below the time series to zoom in and out.

All download requests will be logged.

NDVI: Normalized Difference Vegetation Index

No NDVI data have been received for site US-Pnp.

NDVI (unitless)

Resolution: 0.01° x 0.01° & 10 minutes

Coordinates for pixel: Lat: 43.1100 Long: -89.4400

NIRv Near-Infrared Reflectance of vegetation

No NIRv data have been received for site US-Pnp.

NIRv (unitless)

Resolution: 0.01° x 0.01° & 10 minutes

Coordinates for pixel: Lat: 43.1100 Long: -89.4400

DSR: Surface downward shortwave radiation

No DSR data have been received for site US-Pnp.

Shortwave Radiation (W/m2)

Resolution: 0.01° x 0.01° & Hourly

Coordinates for pixel: Lat: 43.1100 Long: -89.4400

LST: Land Surface Temperature

No LST data have been received for site US-Pnp.

LST (K)

Resolution: 0.02° x 0.02° & Hourly

Coordinates for pixel: Lat: 43.1000 Long: -89.4400

Citation

This material can be used without obtaining permission from NASA. NASA should be acknowledged as the source of this material.

Subset Data Citation:

Hashimoto, H., Wang, W., Park, T., Khajehei, S., Ichii, K., Michaelis, A.R., Guzman, A., Nemani, R.R., Torn, M., Yi, K., Brosnan, I.G. (in preparation). Subsets of geostationary satellite data over international observing network sites for studying the diurnal dynamics of energy, carbon, and water cycles.

Relevant Science Publication Citation:

GeoNEX Surface Reflectance for Vegetation Indices (NDVI & NIRv)

Wang, W., Wang, Y., Lyapustin, A., Hashimoto, H., Park, T., Michaelis, A., & Nemani, R. (2022). A novel atmospheric correction algorithm to exploit the diurnal variability in hypertemporal geostationary observations. Remote Sensing, 14(4), 964.

GeoNEX Surface Downward Solar Radiation (DSR):

Li, R., Wang, D., Wang, W., & Nemani, R. (2023). A GeoNEX-based high-spatiotemporal-resolution product of land surface downward shortwave radiation and photosynthetically active radiation. Earth System Science Data, 15(3), 1419-1436.

GeoNEX Land Surface Temperature (LST):

Jia, A., Liang, S., & Wang, D. (2022). Generating a 2-km, all-sky, hourly land surface temperature product from Advanced Baseline Imager data. Remote Sensing of Environment, 278, 113105.

Search Publications for this Site Publications Found: 2

AmeriFlux Publications

Add Publication

Year	Publication
2019	Reed, D. E., Desai, A. R., Whitaker, E. C., Nuckles, H. (2019) Evaluation Of Low-Cost, Automated Lake Ice Thickness Measurements, Journal Of Atmospheric And Oceanic Technology, 36(4), 527-534. https://doi.org/10.1175/JTECH-D-18-0214.1
2018	David E. Reed, Hilary A. Dugan, Amelia L. Flannery, Ankur R. Desai (2018) Carbon Sink And Source Dynamics Of A Eutrophic Deep Lake Using Multiple Flux Observations Over Multiple Years, Limnology And Oceanography Letters, . https://doi.org/10.1002/lol2.10075

BADM for This Site

Access the Biological, Ancillary, Disturbance and Metadata (BADM) information and data for this site.

BADM contain information for many uses, such as characterizing a site’s vegetation and soil, describing disturbance history, and defining instrumentation for flux processing. They complement the flux/met data.

Download BADM for this site^*

View Site General Info for this site (Overview tab)^*

Use Online Editor to update Site General Info or DOI Authorship

Update information about submitted data (Variable Information tool)

More BADM resources

^* Online updates are shown on the Overview tab real time. However, downloaded BADM files will not reflect those updates until they have been reviewed for QA/QC.

Wind Roses

Click an image below to enlarge it, or use the navigation panel.

Image scale: 741m x 741m

Image scale: 1482m x 1482m

Data Collected: 2016 - 2018

Wind roses use variables ‘WS’ and ‘WD’.
Download Data Download Wind Rose as Image File (PNG)

Wind Speed (m/s)

Navigation

All

Annual Annual Average

Mar-Jun 6AM to 6PM 6PM to 6AM

Jun-Sep 6AM to 6PM 6PM to 6AM

Sep-Dec 6AM to 6PM 6PM to 6AM

Dec-Mar 6AM to 6PM 6PM to 6AM

Graph Type

Wind Speed Scale

Wind Direction Scale (%)

Show Satellite Image

Show Wind Rose

Annual Average

About Ameriflux Wind Roses

Wind Rose Explanation

A wind rose gives a succinct view of how wind speed and direction are typically distributed at a particular location. Presented in a circular format, a wind rose shows the frequency and intensity of winds blowing from particular directions. The length of each “spoke” around the circle indicates the amount of time (frequency) that the wind blows from a particular direction. Colors along the spokes indicate categories of wind speed (intensity). Each concentric circle represents a different frequency, emanating from zero at the center to increasing frequencies at the outer circles

Utility

This information can be useful to gain insight into regions surrounding a flux tower that contribute to the measured fluxes, and how those regions change in dependence of the time of day and season. The wind roses presented here are for four periods of the year, and in 16 cardinal directions. Graphics are available for all sites in the AmeriFlux network based on reported wind measurements at each site.

Data from each site can be downloaded by clicking the ‘download’ button.

Hover the cursor over a wind rose to obtain directions, speeds and intensities.

Note that wind roses are not equivalent to flux footprints. Specifically, the term flux footprint describes an upwind area “seen” by the instruments measuring vertical turbulent fluxes, such that heat, water, gas and momentum transport generated in this area is registered by the instruments. Wind roses, on the other hand, identify only the direction and speed of wind.

Where do these data come from?

The wind roses are based on observed hourly data from the sites registered with the AmeriFlux Network.

Parameters for AmeriFlux Wind Roses

To use wind roses for a single AmeriFlux site, the following parameters may be most useful:

Wind Speed Scale: Per Site
Wind Direction Scale (%): Per Site

To compare wind roses from more than one single AmeriFlux site, the following parameters may be most useful:

Wind Speed Scale: Non-Linear
Wind Direction Scale (%): AmeriFlux

Mar - Jun; 6am - 6pm

Mar - Jun; 6pm - 6am

Jun - Sep; 6am - 6pm

Jun - Sep; 6pm - 6am

Sep - Dec; 6am - 6pm

Sep - Dec; 6pm - 6am

Dec - Mar; 6am - 6pm

Dec - Mar; 6pm - 6am

US-Pnp: Lake Mendota, Picnic Point Site

US-Pnp: Lake Mendota, Picnic Point Site

DOI(s) for citing US-Pnp data

Publication(s) for citing site characterization

Acknowledgments

Resources

US-Pnp: Lake Mendota, Picnic Point Site

Not Found

US-Pnp: Lake Mendota, Picnic Point Site

Picnic Point tower

Picnic Point from below

US-Pnp: Lake Mendota, Picnic Point Site

US-Pnp: Lake Mendota, Picnic Point Site

BADM for This Site

US-Pnp: Lake Mendota, Picnic Point Site

Wind Roses

Wind Speed (m/s)

Navigation