MSL Temperature Change From 1.5 Meters AGL to the Ground

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(Updated 4/3/2014)

This article looks at the variation between air and ground temperature for 500 sols (Martian days) at MSL Curiosity from landing to Sol 570 on March 14, 2014. For the missing days there was no data reported. The initial assumption was that with the thin atmosphere generally accepted (before our research began) the daytime rate of heat loss between the ground and the mast at a height of 1.5 meters above ground level would be fairly consistent with little variation. Likewise the ground would cool faster than the air at night and this would also be consistent. It was hypothesized that a large amount of variation especially at night would suggest a more complex atmosphere with a higher density than what NASA claims. In fact, as Table 1, its supporting graphs and data show, during the days there was a standard deviation of 6.625442 °C (about 11.92 °F) in general heating of the ground as attention shifted from the mast to the ground where it was about 12 °C warmer, and during the night there was a standard deviation of about 9.1949 °C (16.55 °F) in general cooling (with notable exceptions at sols 34,123,192,215, 310, 466, 486, 489, 501, 513, and 537) as attention shifted from the mast to the ground where it was about 7.774 °C cooler.

 

DAY OR NIGHT

MEAN MAX

AIR TEMP (DAY) OR MINIMUM (NIGHT)

MEAN MAX GROUND TEMP °C

(DAY) OR MINIMUM (NIGHT)

STANDARD DEVIATION IN MAX AIR TEMP °C (DAY) OR MINIMUM (NIGHT)

STANDARD DEVIATION IN MAX GROUND TEMP (DAY) OR MINIMUM (NIGHT)

MEAN DIFFERENCE AIR TO GROUND °C

 

STANARD DEVIATION

°C

DIFFERENCE AIR TO GROUND (All sols)

DAY

-11.071

0.82389

10.2071

9.26571

12.03 °C for 500 sols; 12.1683°C if Sol 502 is excluded.

6.625442

NIGHT

-74.838

-82.612

9.1671057

9.1949197

-7.774

7.20880418

 

CHANGE IN TEMPERATURE DURING DAYLIGHT AT MARS SCIENCE LABORATORY BETWEEN AIR AT 1.5 METERS ABOVE GROUND LEVEL AT THE GROUND.

SOL

MAX AIR TEMP °C

MAX GROUND TEMP °C

DAYTIME INCREASE (or drop) IN TEMP °C AIR TO GROUND

  
 
 
 

1

-6

21

27

  

9

-13

17

30

  

10

-16

8

24

  

11

-11

9

20

  

12

-18

8

26

  

13

-15

8

23

  

14

-16

8

24

  

15

-15

8

23

  

16

0

9

9

  

17

-4

6

10

  

18

-21

2

23

  

19

-3

7

10

  

20

-1

8

9

  

21

-3

7

10

  

22

-6

8

14

  

23

-16

8

24

  

24

-7

6

13

  

25

-11

6

17

  

26

-14

5

19

  

27

-15

5

20

  

28

-15

5

20

  

29

-2

6

8

  

30

-3

6

9

  

31

-23

1

24

  

32

-2

6

8

  

33

-2

5

7

  

34

1

5

4

  

35

-1

6

7

  

36

-1

6

7

  

37

0

6

6

  

38

-13

7

20

  

39

-8

7

15

  

40

-12

7

19

  

41

-12

7

19

  

42

-7

7

14

  

43

-12

9

21

  

44

-10

13

23

  

45

-9

11

20

  

46

-12

13

25

  

47

-9

13

22

  

48

0

11

11

  

49

-10

9

19

  

50

-10

11

21

  

51

-7

13

20

  

52

-7

12

19

  

53

-5

11

16

  

54

-9

10

19

  

55

-2

10

12

  

56

-4

10

14

  

57

-3

12

15

  

58

-3

11

14

  

59

-1

11

12

  

60

-2

12

14

  

61

-2

12

14

  

62

-1

11

12

  

63

0

11

11

  

64

0

12

12

  

65

-2

12

14

  

66

-2

11

13

  

67

-6

13

19

  

68

-2

12

14

  

69

0

12

12

  

70

-1

13

14

  

71

-2

12

14

  

72

-2

12

14

  

73

0

13

13

  

74

-5

13

18

  

75

-1

12

13

  

76

-1

14

15

  

77

0

14

14

  

78

0

13

13

  

79

-1

13

14

  

80

-3

14

17

  

81

-2

13

15

  

82

0

13

13

  

83

0

15

15

  

84

0

15

15

  

85

-1

14

15

  

86

-4

15

19

  

87

-2

15

17

  

88

-2

15

17

  

89

-1

15

16

  

90

0

16

16

  

91

-1

15

16

  

92

-1

15

16

  

93

-1

15

16

  

94

0

15

15

  

95

0

14

14

  

96

2

15

13

  

97

-3

14

17

  

98

-1

15

16

  

99

-1

13

14

  

100

-1

13

14

  

101

-2

15

17

  

102

-3

17

20

  

103

-3

18

21

  

104

-5

17

22

  

105

-6

17

23

  

106

-8

17

25

  

107

-5

16

21

  

108

-4

16

20

  

109

-3

16

19

  

110

-5

17

22

  

111

-4

17

21

  

112

-8

18

26

  

113

-6

15

21

  

114

-6

18

24

  

115

-8

16

24

  

116

-6

17

23

  

117

-5

18

23

  

118

-6

18

24

  

119

-6

18

24

  

120

-3

16

19

  

121

0

9

9

  

122

-3

3

6

  

123

-10

2

12

  

124

-5

5

10

  

125

-5

6

11

  

126

-4

6

10

  

127

-1

7

8

  

128

-3

6

9

  

129

-2

5

7

  

130

-9

5

14

  

131

-8

5

13

  

132

-6

4

10

  

133

1

5

4

  

134

-1

7

8

  

135

-5

8

13

  

136

-1

7

8

  

137

-1

7

8

  

138

-1

7

8

  

139

0

8

8

  

140

-2

7

9

  

141

-2

7

9

  

142

0

8

8

  

143

-2

8

10

  

144

2

7

5

  

145

-1

6

7

  

146

-1

7

8

  

147

0

5

5

  

148

3

5

2

  

149

0

4

4

  

150

-3

5

8

  

151

-3

4

7

  

152

1

5

4

  

153

1

4

3

  

154

-2

4

6

  

155

0

4

4

  

156

0

4

4

  

157

-2

5

7

  

158

-3

3

6

  

159

-4

4

8

  

160

-3

5

8

  

161

-2

5

7

  

162

-1

7

8

  

163

-1

5

6

  

164

-1

7

8

  

165

-3

4

7

  

166

-5

3

8

  

167

-3

5

8

  

168

1

6

5

  

169

0

5

5

  

170

0

5

5

  

171

1

5

4

  

172

0

6

6

  

173

0

5

5

  

174

0

7

7

  

175

-4

5

9

  

176

0

5

5

  

177

-1

5

6

  

178

-2

5

7

  

179

-7

4

11

  

180

-1

5

6

  

181

1

5

4

  

182

0

7

7

  

183

-1

5

6

  

184

0

5

5

  

185

-5

7

12

  

186

-2

4

6

  

187

-1

6

7

  

188

-3

6

9

  

189

-2

5

7

  

190

-3

6

9

  

191

-3

6

9

  

192

-16

7

23

  

194

1

4

3

  

195

-3

6

9

  

196

-3

5

8

  

197

-2

5

7

  

198

0

3

3

  

199

-21

2

23

  

214

-4

7

11

  

221

-3

6

9

  

222

-5

6

11

  

223

-1

6

7

  

224

-8

6

14

  

225

1

5

4

  

226

4

6

2

  

227

3

7

4

  

228

-4

6

10

  

229

0

6

6

  

230

-6

6

12

  

231

-5

6

11

  

232

-3

6

9

  

233

-4

5

9

  

234

0

6

6

  

235

-3

6

9

  

236

-5

5

10

  

237

-2

6

8

  

238

-1

5

6

  

239

-6

5

11

  

240

0

4

4

  

241

-7

6

13

  

242

-7

5

12

  

243

-6

6

12

  

244

-6

5

11

  

245

-1

6

7

  

246

-4

5

9

  

247

-4

3

7

  

248

-3

4

7

  

249

-2

4

6

  

250

-2

6

8

  

251

-8

5

13

  

252

-6

4

10

  

253

-3

4

7

  

254

-5

5

10

  

255

-2

4

6

  

256

-1

4

5

  

257

-9

5

14

  

258

-3

5

8

  

259

-11

2

13

  

260

-4

4

8

  

261

-22

-2

20

  

267

-5

2

7

  

268

-3

2

5

  

269

-6

1

7

  

270

-6

2

8

  

271

-5

-2

3

  

272

-4

-2

2

  

273

-2

-2

0

  

274

-6

-2

4

  

275

-4

-1

3

  

276

-4

-2

2

  

277

-3

-2

1

  

278

-5

-2

3

  

279

-4

0

4

  

280

-2

-1

1

  

281

-2

-1

1

  

282

-4

0

4

  

283

-3

-2

1

  

284

-5

0

5

  

285

-2

-1

1

  

286

-3

-2

1

  

287

-4

-1

3

  

288

-3

-1

2

  

289

-3

-1

2

  

290

-4

-1

3

  

291

-1

-2

-1

  

292

-4

0

4

  

293

-4

-1

3

  

294

-15

-2

13

  

296

-7

1

8

  

297

-3

2

5

  

298

-9

-2

7

  

299

-8

-3

5

  

300

-6

-5

1

  

301

-3

0

3

  

302

-8

1

9

  

303

-6

1

7

  

304

-5

1

6

  

305

-8

1

9

  

306

-8

-4

4

  

307

-5

-2

3

  

308

-7

-3

4

  

309

-9

-2

7

  

310

-8

-3

5

  

311

-11

-2

9

  

312

-14

1

15

  

313

-11

2

13

  

314

-10

2

12

  

315

-16

2

18

  

316

-4

1

5

  

317

-4

2

6

  

318

-3

4

7

  

319

-4

3

7

  

320

-5

2

7

  

321

-5

3

8

  

322

-6

3

9

  

323

-8

7

15

  

324

-8

7

15

  

325

-5

5

10

  

326

-8

6

14

  

327

 

7

7

  

328

-7

6

13

  

329

-5

7

12

  

330

-3

5

8

  

331

-5

3

8

  

332

-5

2

7

  

333

-6

-1

5

  

334

-7

4

11

  

335

-8

4

12

  

336

-7

3

10

  

337

-7

2

9

  

338

-8

2

10

  

339

-6

4

10

  

340

-6

3

9

  

341

-7

2

9

  

342

-11

2

13

  

343

-6

2

8

  

344

-7

2

9

  

345

-7

1

8

  

346

-9

1

10

  

347

-8

1

9

  

348

-12

-2

10

  

349

-6

-1

5

  

350

-12

-4

8

  

351

-9

-3

6

  

352

-8

-5

3

  

353

-13

-2

11

  

354

-7

-1

6

  

355

-7

-2

5

  

356

-7

-2

5

  

357

-8

-1

7

  

364

-13

0

13

  

365

-12

-3

9

  

366

-9

-3

6

  

367

-9

-3

6

  

368

-9

2

11

  

369

-9

-2

7

  

370

-11

-4

7

  

371

-9

-1

8

  

372

-8

-1

7

  

373

-9

-1

8

  

374

-9

-2

7

  

375

-11

-3

8

  

376

-12

0

12

  

377

-18

-5

13

  

378

-12

-12

0

  

379

-13

-5

8

  

380

-13

-4

9

  

381

-14

-5

9

  

382

-12

-7

5

  

383

-12

-5

7

  

384

-12

-4

8

  

385

-12

-8

4

  

386

-13

-8

5

  

387

-13

-7

6

  

388

-14

-8

6

  

389

-16

-2

14

  

390

-17

-10

7

  

391

-17

-5

12

  

392

-18

-5

13

  

393

-18

-5

13

  

394

-20

-5

15

  

395

-15

-5

10

  

396

-15

-8

7

  

397

-14

-7

7

  

398

-16

-5

11

  

399

-16

-6

10

  

400

-15

-6

9

  

401

-18

-4

14

  

402

-18

-6

12

  

403

-20

-7

13

  

404

-25

-7

18

  

405

-15

0

15

  

406

-17

-1

16

  

407

-16

0

16

  

408

-17

-3

14

  

409

-14

-8

6

  

410

-17

-9

8

  

411

-22

-3

19

  

412

-22

-3

19

  

413

-18

-5

13

  

414

-19

-5

14

  

415

-18

-6

12

  

416

-21

-3

18

  

417

-21

-3

18

  

418

-24

-6

18

  

419

-19

-7

12

  

420

-24

-8

16

  

421

-20

-8

12

  

422

-24

-12

12

  

423

-22

-5

17

  

424

-21

-6

15

  

425

-22

-6

16

  

426

-21

-5

16

  

427

-23

-7

16

  

428

-21

-6

15

  

429

-24

-6

18

  

430

-24

-10

14

  

431

-26

-9

17

  

432

-26

-11

15

  

433

-25

-11

14

  

434

-24

-9

15

  

435

-24

-8

16

  

436

-27

-11

16

  

437

-26

-15

11

  

438

-21

-16

5

  

439

-25

-12

13

  

440

-23

-11

12

  

441

-22

-10

12

  

442

-24

-12

12

  

454

-28

-12

16

  

455

-26

-12

14

  

462

-28

-12

16

  

463

-26

-13

13

  

464

-26

-13

13

  

465

-23

-13

10

  

466

-26

-12

14

  

467

-28

-11

17

  

468

-29

-14

15

  

469

-29

-12

17

  

472

-31

-10

21

  

473

-29

-8

21

  

474

-26

-9

17

  

475

-28

-9

19

  

476

-25

-7

18

  

477

-26

-9

17

  

486

-31

-12

19

  

489

-29

-11

18

  

490

-31

-12

19

  

491

-30

-13

17

  

492

-30

-13

17

  

493

-32

-14

18

  

494

-24

-9

15

  

495

-26

-10

16

  

496

-26

-10

16

  

497

-30

-9

21

  

498

-28

-10

18

  

499

-30

-9

21

  

500

-23

-11

12

  

501

-28

-10

18

  

502

-30

-87

-57

  

504

-29

-9

20

  

505

-29

-8

21

  

506

-27

-9

18

  

507

-25

-10

15

  

508

-29

-11

18

  

509

-30

-13

17

  

510

-31

-13

18

  

511

-31

-10

21

  

512

-24

-9

15

  

513

-29

-10

19

  

514

-28

-10

18

  

515

-23

-6

17

  

516

-25

-6

19

  

517

-27

-6

21

  

518

-29

-9

20

  

519

-25

-11

14

  

520

-24

-9

15

  

521

-26

-7

19

  

522

-26

-7

19

  

523

-25

-7

18

  

524

-27

-7

20

  

525

-29

-11

18

  

526

-24

-10

14

  

527

-23

-7

16

  

528

-26

-9

17

  

529

-23

-11

12

  

530

-28

-11

17

  

531

-22

-12

10

  

532

-23

-10

13

  

533

-30

-7

23

  

534

-29

-6

23

  

535

-29

-7

22

  

536

-29

-12

17

  

537

-28

-11

17

  

538

-25

-8

17

  

539

-23

-17

6

  

540

-29

-18

11

  

541

-27

-11

16

  

542

-29

-11

18

  

543

-26

-16

10

  

544

-27

-16

11

  

545

-29

-14

15

  

546

-34

-13

21

  

547

-29

-10

19

  

548

-28

-10

18

  

549

-23

-12

11

  

550

-27

-9

18

  

551

-28

-11

17

  

552

-29

-11

18

  

553

-26

-10

16

  

554

-22

-7

15

  

555

-31

-9

22

  

556

-29

-7

22

  

557

-29

-6

23

  

558

-26

-6

20

  

559

-27

-3

24

  

560

-23

-6

17

  

561

-23

-5

18

  

562

-23

-11

12

  

563

-31

-9

22

  

564

-27

-11

16

  

565

-27

-8

19

  

566

-27