Sampling station map & location selector
?
Sampling Location & Map Controls
Global
- Search any place: Type a city, campus, or address in the search bar and click Find.
- Enter exact coordinates: Type Latitude (°N) and Longitude (°E) directly.
- Pick on map: Click Locked to unlock, then click anywhere on the map (or drag the target pin) to position your T-AERO sampler.
- Lock Location: Click Lock & Fetch to save the site and fetch live or historical meteorology for those exact coordinates.
Wind & Weather Conditions
?
Wind & Weather Overview
Station Conditions
What it shows: The essential weather conditions at your sampling station (current reading in Live Weather mode, or period average in Historical Archive mode):
- Compass & Wind Direction: Shows where the wind is blowing from (0° = North, 90° = East, 180° = South, 270° = West) and the animated airflow across the station.
- Wind Speed: Air speed at 10 m above ground in m/s (and km/h).
- Temperature, RH & Pressure: Ambient air temperature (°C), relative humidity (%), and barometric pressure (hPa).
LIVE NOW
Wind speed
--
m/s
(-- km/h)
Wind direction
--°
--
Temperature
-- °C
Dew point: -- °C
Relative Humidity
-- %
Ambient moisture
Pressure
-- hPa
Surface barometric
4-Stage Cascade Impactor
?
T-AERO 4-Stage Cascade Impactor
Inertial Fractionation
Dae50 Stages
How it works: Ambient air is drawn through 4 successively narrower nozzles onto 30 mm quartz/acrylic TXRF reflector discs. At each stage, larger particles with higher inertia impact onto the collection plate, while smaller unimpacted particles follow the airflow streamlines to the next stage:
- Stage 1: Collects coarse particles > 10 µm (PM10)
- Stage 2: Collects fine particles 10 – 2.5 µm (PM2.5)
- Stage 3: Collects accumulation mode 2.5 – 1.0 µm (PM1.0)
- Stage 4: Collects ultrafine particles 1.0 – 0.15 µm (PM0.15)
Stage 1
> 10 µm
Coarse · PM10
Stage 2
10 – 2.5 µm
Fine · PM2.5
Stage 3
2.5 – 1.0 µm
Accumulation · PM1.0
Stage 4
1.0 – 0.15 µm
Ultrafine · PM0.15
Mean wind speedU10
--
Maximum--
Calm <0.5 m/sCALM
--
Hours--
Prevailing directionVEC
--
Vector mean azimuth--
Temperature 2 mT2M
--
Range--
Relative humidityRH
--
Hours >80%--
Pressure · rainPSFC
--
Rain total--
Wind rose
? How to Read the Wind Rose 16 Compass SectorsWhat it is: A directional compass diagram showing where the wind blew from and how fast during the selected window.
- Spoke direction (N, E, S, W): Points to the direction the air mass came from. Helps identify which upwind sources (city, highway, sea, industry) carried trace elements to your T-AERO sampler.
- Spoke length (%): The concentric rings show the percentage of total hours the wind blew from that sector.
- Colors (Speed bins): Each bar is stacked by wind speed—from calm stagnation (<0.5 m/s, amber) to strong transport winds (cyan/blue/purple).
<0.5 m/s (Calm)
0.5–1.5 m/s
1.5–3.0 m/s
3.0–5.0 m/s
>5.0 m/s
Diurnal boundary-layer profile
? How to Read the Diurnal Profile 24-Hour CycleWhat it is: The average 24-hour daily cycle (00:00 to 23:00) combining Wind Speed, Air Temperature, and Relative Humidity across the selected days.
- Cyan solid curve (left axis): Average wind speed U10 (m/s) at each hour of the day.
- Orange dashed curve (right axis): Average temperature T2m (°C).
- Blue solid curve (far-right axis): Average relative humidity RH (%).
- Why it matters for T-AERO sampling: At night (20:00–08:00), cool air, high humidity, and weak winds trap aerosols near the ground (inversion). In the afternoon (12:00–17:00), solar warming and stronger winds mix the air vertically, diluting surface PM concentrations.
Hourly time series
? How to Read the Hourly Time Series 3 Synchronized PanelsWhat it is: Hour-by-hour meteorological history aligned on a shared time axis so you can inspect conditions during any specific T-AERO sampling run.
- 1. Wind Speed & Red Dashed Line (0.5 m/s): Whenever the cyan line drops below the red dashed 0.5 m/s line, the air is stagnant and local emissions accumulate rapidly.
- 2. Temperature & Humidity: High RH (>80%) promotes hygroscopic water uptake on fine particles (PM2.5 / PM1.0).
- 3. Pressure & Rain Bars: Blue vertical bars show rain events (mm/h) that wash particles out of the air (wet scavenging).
1. WIND SPEED U10 (m/s) & CALM STAGNATION THRESHOLD (0.5 m/s)
RED DASH = 0.5 m/s STAGNATION LIMIT
2. AMBIENT TEMPERATURE T_2m (°C) & RELATIVE HUMIDITY RH (%)
GAS-PARTICLE PARTITIONING & WATER UPTAKE
3. SURFACE PRESSURE P_sfc (hPa) & WET SCAVENGING PRECIPITATION (mm/h)
WET SCAVENGING WASHOUT TRACKER
Hourly telemetry
PMF / OpenAir exportWhat the columns mean
U_10mWind speed at 10 m (m/s). This is speed, not direction.
AZIMUTHDirection the wind blows from, in degrees; 0° = north, 90° = east, clockwise.
SECTORThe 16-point compass sector matching the azimuth (e.g. 315° = NW).
T_2mAir temperature at 2 m above ground (°C).
DEW POINTSaturation temperature; the closer to T_2m, the higher the humidity and fog risk.
RHRelative humidity: percentage saturation of the air at temperature T_2m.
P_sfcSurface atmospheric pressure (hPa). Used to normalise sampled volume to STP.
RAINHourly precipitation depth (mm). Indicates wet deposition of particles.
| Time | U_10m (m/s) | AZIMUTH (°) | SECTOR | T_2m (°C) | DEW POINT (°C) | RH (%) | P_sfc (hPa) | RAIN (mm) |
|---|