Beta 6

Now with concrete, vehicle and home temps and profiles

about.html

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   <!-- Open Graph -->
   <meta property="og:title" content="About SunScope · The True Temperature" />
-  <meta property="og:description" content="What is UTCI? How does the SunScope soak-factor work? Learn how SunScope gives you a more honest outdoor comfort forecast than standard air temperature." />
+  <meta property="og:description" content="What is UTCI? How does the SunScope soak-factor work? Learn how SunScope calculates urban concrete heat, vehicle interior temperatures, and gives you a more honest outdoor comfort forecast." />
   <meta property="og:url" content="https://sunscope.net/about.html" />
   <meta property="og:type" content="website" />
 
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     a more honest, real-world comfort score for anyone heading outdoors.
   </p>
 
+  <h2>Urban heat: concrete surface temperature</h2>
+  <p>
+    The UTCI standard was developed with a natural grass surface as its reference ground — the
+    assumption being that you're standing in a park or open field. In a city, that assumption
+    breaks down. Concrete and tarmac absorb more solar energy than grass, and unlike grass they
+    cannot cool themselves through evaporation. On a sunny summer afternoon, exposed concrete
+    can run 15–25 °C hotter than the surrounding air.
+  </p>
+  <p>
+    SunScope's <strong>Concrete surface</strong> column estimates the temperature of sun-exposed
+    urban paving using an energy-balance model that accounts for how much solar radiation the
+    surface absorbs, how efficiently the air above it carries that heat away (which depends on
+    wind speed), and the reflective properties of typical urban concrete. The result gives you
+    a sense of the contact heat stress you'd experience sitting, standing, or walking barefoot
+    on city surfaces — something the standard UTCI value alone won't tell you.
+  </p>
+  <p>
+    The column is enabled by default in the <strong>Urban</strong> profile and colour-coded:
+    values above 30 °C are shown in amber, above 40 °C in red.
+  </p>
+
+  <h2>Vehicle interior temperature</h2>
+  <p>
+    A sealed, parked vehicle heats up far faster than most people expect. SunScope's
+    <strong>Vehicle</strong> column models the ambient cabin air temperature experienced by an
+    occupant who is seated out of direct sunlight — the classic scenario of a child or pet left
+    inside a parked car.
+  </p>
+  <p>
+    The calculation combines two physical processes. The first is <strong>body panel
+    conduction</strong>: metal body panels (roof, doors, bonnet) absorb solar radiation and
+    conduct heat into the cabin regardless of the sun's position in the sky. This is the slow,
+    relentless background heat that builds even on overcast days. The second is
+    <strong>side-window solar gain</strong>: when the sun is at an elevation where its rays
+    cut through the side glass rather than striking the roof or reflecting off at a shallow
+    angle, additional heat enters the cabin. Because the occupant is modelled as sitting out of
+    the direct beam, this energy goes into raising the ambient cabin air temperature rather than
+    heating the person directly — which is precisely what makes it so dangerous. The air around
+    you heats up steadily while you remain unaware of how hot the environment has become.
+  </p>
+  <p>
+    Wind speed has almost no effect on a sealed vehicle and is not factored in. The figure shown
+    represents a steady-state cabin temperature reached after approximately 45–60 minutes of
+    parking. Values above 35 °C are shown in amber (dangerous for children and pets); above
+    45 °C in red (potentially fatal within minutes).
+  </p>
+
   <h2>Reading the stress bands</h2>
   <p>SunScope maps every UTCI+P value to a thermal stress band so you can read conditions at a glance:</p>