| IT | Silicate |
|---|---|
| months since 1960-01-01 | micro mole/L |
| 1-15 Nov 1996 | 11.0 |
| 16-30 Nov 1996 | 2.0 |
| 1-15 Dec 1996 | 2.3 |
| 16-30 Dec 1996 | 5.3 |
| 1-15 Jan 1997 | 4.1 |
| 16-30 Jan 1997 | 1.3 |
| 1-15 Feb 1997 | 5.8 |
| 16-30 Feb 1997 | 7.7 |
| 1-15 Mar 1997 | 3.9 |
| 1-15 Apr 1997 | 3.5 |
| 16-30 Apr 1997 | 2.4 |
| 1-15 May 1997 | 7.7 |
| 16-30 May 1997 | 3.9 |
| 1-15 Jun 1997 | 0.8 |
| 16-30 Jun 1997 | 2.6 |
| 1-15 Jul 1997 | 4.1 |
| 16-30 Jul 1997 | 9.3 |
| 1-15 Aug 1997 | 1.1 |