EARTH S MESOSPHERE AND LOWER THERMOSPHERE (MLT) REGION AS A GATEWAY BETWEEN THE LOWER ATMOSPHERE AND SPACE IS STRONGLY INFLUENCED BY ENERGY AND MOMENTUM INPUTS FROM ABOVE AND BELOW. GREAT UNDERSTANDING HAS BEEN ACHIEVED IN THE INTERACTION OF LOWER ATMOSPHERIC WAVES WITH THE MLT BUT THE GLOBAL MORPHOLOGY AND EVOLUTION OF MLT VARIATIONS ASSOCIATED WITH ENERGY AND MOMENTUM INPUTS FROM THE SOLAR WIND AND MAGNETOSPHERE DURING GEOMAGNETIC STORMS ARE STILL ELUSIVE. THE PHYSICAL PROCESSES DRIVING THESE VARIATIONS HAVE SELDOM BEEN STUDIED AND NOT FULLY UNDERSTOOD. RECENT OBSERVATIONS HAVE SHOWN EVIDENCE THAT MLT TEMPERATURES CAN CHANGE SIGNIFICANTLY AND GLOBALLY DURING GEOMAGNETIC STORMS AND SUGGEST THAT THIS TEMPERATURE CHANGE IS LIKELY TO BE DIRECTLY LINKED TO THE STORM-TIME DYNAMICS AND THERMODYNAMICS IN THE UPPER ATMOSPHERE. PREVIOUS STUDIES ON MLT STORM RESPONSES HAVE MOSTLY FOCUS ON THE CHEMICAL EFFECTS OF ENERGETIC PARTICLES WITHOUT FULLY EXPLORING THE POTENTIAL IMPACTS OF THE DYNAMIC EFFECTS OF STORMS ON THE REGION. THIS IMPAIRS OUR UNDERSTANDING OF THE PHYSICAL MECHANISMS THAT CAUSE THESE CHANGES AND THEIR EFFECTS ON THE COUPLING OF DIFFERENT ATMOSPHERIC LAYERS. HERE WE PROPOSE TO ADDRESS THIS ISSUE BY USING FIRST PRINCIPLES NUMERICAL SIMULATIONS AND TIMED/ SABER AND AIM/SOPHIE TEMPERATURE DATA TO UNDERSTAND HOW GLOBAL STRUCTURES OF THE MLT TEMPERATURE CHANGE DURING DIFFERENT TYPES OF GEOMAGNETIC STORMS AND THEIR EFFECTS ON WAVES AND MEAN FLOW IN THE MLT REGION.