diff --git a/index.html b/index.html
index fd2ba0c4..4f5ff82b 100644
--- a/index.html
+++ b/index.html
@@ -2356,9 +2356,16 @@
               <i data-locked="0" id="lock_temperaturePole" class="icon-lock-open"></i>
               <label data-tip="Set temperature near poles">
                 <i>Poles:</i>
+                <br>
+                <i>North Pole</i>
                 <input id="temperaturePoleInput" data-stored="temperaturePole" type="number" min="-50" max="50" />°C =
                 <span id="temperaturePoleF"></span>°F
                 <input id="temperaturePoleOutput" data-stored="temperaturePole" type="range" min="-50" max="50" />
+                <br>
+                <i>South Pole</i>
+                <input id="temperatureSPoleInput" data-stored="temperatureSPole" type="number" min="-50" max="50" />°C =
+                <span id="temperatureSPoleF"></span>°F
+                <input id="temperatureSPoleOutput" data-stored="temperatureSPole" type="range" min="-50" max="50" />
               </label>
             </div>
             <div>
diff --git a/main.js b/main.js
index e6f95d45..d2ba4053 100644
--- a/main.js
+++ b/main.js
@@ -1010,8 +1010,10 @@ function calculateTemperatures() {
   cells.temp = new Int8Array(cells.i.length); // temperature array
 
   const tEq = +temperatureEquatorInput.value;
-  const tPole = +temperaturePoleInput.value;
-  const tDelta = tEq - tPole;
+  const tPoleN = +temperaturePoleInput.value;
+  //TODO Find proper delta to calculate
+  const tSPole = +temperatureSPoleInput.value;
+  const tDelta = tEq - tPoleN;
   const int = d3.easePolyInOut.exponent(0.5); // interpolation function
 
   d3.range(0, cells.i.length, grid.cellsX).forEach(function (r) {